The Mantus M1 Anchors

proven strength and top knotch setting power.

Mantus M1

Original

The Future of Performance Anchoring

Mantus M1

Performance

Mantus M1

Original

FREQUENTLY ASKED QUESTIONS

DIGS LIKE NO OTHER The Mantus Anchor is designed to penetrate dense, grassy bottoms and set with unparalleled holding power. When tested, our anchors set faster and deeper than any other tested anchor, including Rocna, Manson Supreme, Bulwagga, Fortress, Bruce, CQR and Danforth anchors.

The Mantus Marine anchor lineup simply has the best boat anchors available, whether you are a long-range cruiser, racing, or going out for a day sail. The Mantus quick-set anchor is stowable and breaks down for easy storage, so you can store one or two as spares without needing to take up much boat space.


Machined chisel nose is optimized for best penetration

Shank/Fluke Bolted Joint: Four Grade-5 bolts, Each stronger than the appropriate size chain.

Ear tabs: increase the angle of attack, and thus pressure on the nose for better sea bed penetration.

Shank: Uses Hi Test Steel, Yield Strength 690 Mpa. Shank is inserted into the shank boot and then is welded from above and below.

Fluke: Concave shaped used for the fluke provides the maximum resistance to movement.

Retrieval Hole: Used to rig emergency retrieval line or tandem anchor set up.

BUILT STRONG

  • Formed out of high-quality steel plate. Contains no cast parts.
  • Shank and shank boot are welded from top and bottom.
  • Shank and roll bar are bolted to the fluke.
  • ASTM certified steel bolts are oversized with a large margin to ensure safety.
  • Although the shank is attached to the fluke with 4 bolts, a single bolt has sufficient strength to handle the maximum expected load on the anchor. Bolt Details.
  • Stainless Steel anchors feature a 2205 Duplex shank and 316L stainless steel fluke. The surface is hardened by shot-peening and are then electro-polished to provide maximum corrosion resistance.
  • In the carbon steel version, every part of the anchor system is hot-dip galvanized for corrosion protection. (All shanks are HT ASTM 514 Steel and flukes are mild steel A36 equivalent)
  • Sharp-headed nose is precision machined to achieve the perfect chisel shape to achieve maximum penetrating power.

LIFE TIME WARRANTY Mantus Marine offers a lifetime warranty on its anchors (See below for details)

After the release of the Mantus M2 Model, we often get the question: which one is better?  Both Anchors have an amazing setting and resetting ability and both are excellent choices for a primary anchor, but each has its own small specific advantages.  Both anchors roll over well in most bottom conditions and it is rare for a properly weighted anchor to end up upside down. Nevertheless, M1 Anchor, due to its roll bar, is better at rolling over in a really soft, silty bottom. The M2 Anchor is less likely to get plugged up with muddy weeds, and without the need for the roll bar, M2 is less bulky. Thus, the M2 model provides a better fit for boats with bow pulpits with slotted anchor housing and bow sprits.

DIMENSIONS AND FIT

M1 ANCHOR DIMENSIONS
M1 MODEL DIMENSIONS (IMPERIAL)
A B C D E F G H I J
2.5 lbs 17 10.2 11.8 4.0 3.2 0.8 0.3 9.3 6.1 4.1
8 lbs 22 13.0 15.1 5.1 4.1 1.0 0.4 11.9 7.9 5.3
13 lbs 26 15.9 18.4 6.2 5.0 1.2 0.4 14.5 9.6 6.5
17 lbs 29 17.5 20.4 6.9 5.5 1.3 0.5 16.0 10.6 7.1
25 lbs 31 19.0 22.0 7.4 5.9 1.5 0.5 17.3 11.4 7.7
35 lbs 35 21.1 24.5 8.3 6.6 1.6 0.6 19.3 12.7 8.6
45 lbs 39 23.7 27.5 9.3 7.4 1.8 0.7 21.6 14.3 9.6
55 lbs 42 25.4 29.4 10.0 7.9 1.9 0.7 23.2 15.3 10.3
65 lbs 45 27.0 31.4 10.6 8.4 2.1 0.7 24.7 16.3 11.0
85 lbs 47 28.7 33.3 11.3 9.0 2.2 0.8 26.2 17.3 11.7
105 lbs 51 31.1 36.0 12.2 9.7 2.4 0.9 28.3 18.7 12.6
125 lbs 55 33.4 38.8 13.1 10.4 2.6 0.9 30.5 20.1 13.6
155 lbs 63 37.9 44.0 14.9 11.8 2.9 1.0 34.6 22.9 15.4
175 lbs 67 40.5 47.0 12.7 3.1 1.1 37.0 24.4 16.5
M1 MODEL DIMENSIONS (METRIC)
A B C D E F G H I J
1.1 kg 427 259 300 102 81 20 7 236 156 105
3.6   kg 546 331 384 130 103 25 9 302 200 135
5.9   kg 666 403 468 158 126 31 11 368 243 164
7.7   kg 735 446 517 175 139 34 12 407 269 181
11.4 kg 795 482 559 189 150 37 13 440 290 196
15.9 kg 884 536 622 210 167 41 15 489 323 218
20.5 kg 993 602 699 236 188 46 17 550 363 245
25.0 kg 1063 644 747 253 201 49 18 588 388 262
29.5 kg 1132 687 796 269 214 53 19 627 414 279
38.6 kg 1202 729 845 286 227 56 20 665 439 296
47.7 kg 1301 789 915 309 246 61 22 720 475 321
56.8 kg 1401 849 985 333 265 65 23 775 512 345
70.5 kg 1589 964 1118 378 301 74 26 879 581 392
79.5 kg 1699 1030 1194 404 321 79 28 940 621 419
M2 Anchor Sizing Chart
Mantus Anchor Sizing Guide

ANCHOR SIZING GUIDE

Use the following guide to determine what size of anchor to use: 

When making sizing recommendations for a working anchor we are generally referring to the needs of a cruising boat spending most of its time on anchor, in doing so we try to envelope high sustained winds (40 kts) and assume poor holding conditions (low viscosity bottoms). Some may think these recommendations to be too conservative especially when compared to sizing tables from other manufacturers. Companies often make claims of superior anchor efficiency, stating that their small anchor X will outperform a much heavier anchor from their competitors and often use sizing charts as a marketing tool to that end, recommending anchors and anchor systems that are dangerously undersized for their intended use. Comparing surface area can be a good judge for potential holding capability. Our anchor sizing recommendations are presented in the table below and we divided in three categories: Lunch Anchor category is recommended for lighter use, expected winds under 25 knots, working anchor for winds under 40 knots and finally, storm anchor recommendations are intended for winds up to 60 knots. These recommendations are made assuming the worst-case scenario, a poor holding bottom and thus may seem conservative but we believe are accurate.

OUR WARRANTY

The Full Warranty can be read here.

The short version: Mantus anchors are warrantied for the LIFETIME of the original purchaser. If an anchor becomes damaged we will ship a replacement part – shank, fluke or roll-bar. The galvanized coating on anchors is covered for 3 years from date of purchase.

CONSTRUCTION GUIDE

Bolts, Washers and Nuts are provided with every Mantus Anchor. In the event of replacing a lost fastener, please make sure to always use proper size. Always use locking washers, or nylon lock nuts, and tighten the nut securely. Click here to download a printable pdf of the assembly instructions. Mantus Anchor Assembly Instructions
Mantus 17 lbs3/86 bolts, nuts, lock washers
Anchor Size Bolt sizes Number of Bolts
Mantus 8 lbs 1/4 6 bolts, nuts, lock washers
Mantus 13 lbs 3/8 6 bolts, nuts, lock washers
Mantus 25 lbs 3/8 6 bolts, nuts, lock washers
Mantus 35 lbs 1/2 6 bolts, nuts, lock washers
Mantus 45 lbs 1/2 6 bolts, nuts, lock washers
Mantus 55 lbs 5/8 6 bolts, nuts, lock washers
Mantus 65 lbs 5/8 6 bolts, nuts, lock washers
Mantus 85 lbs 5/8 6 bolts, nuts, lock washers
Mantus 105 lbs 3/4 6 bolts, nuts, lock washers
Mantus 125 lbs 3/4 6 bolts, nuts, lock washers
Mantus 155 lbs 3/4 6 bolts, nuts, lock washers
Mantus 175 lbs 3/4 6 bolts, nuts, lock washers

RETURN POLICY

Mantus Marine stands behind its products and wants you to be completely satisfied. If you find that a product does not meet your expectations, or does not work for your application, please contact us as soon as possible so we can work out a solution for you. Please keep all anchor boxes and original packaging until you are sure you want to keep the product. Shipping fees will be deducted from returns. We apologize, but used products cannot be returned. 

Customers that purchased via another sales channel, should contact the relevant store to initiate the return process.

RETURNS

Mantus M1

Performance

FREQUENTLY ASKED QUESTIONS

DIGS LIKE NO OTHER The Mantus Anchor is designed to penetrate dense, grassy bottoms and set with unparalleled holding power. When tested, our anchors set faster and deeper than any other tested anchor, including Rocna, Manson Supreme, Bulwagga, Fortress, Bruce, CQR and Danforth anchors.

The Mantus Marine anchor lineup simply has the best boat anchors available, whether you are a long-range cruiser, racing, or going out for a day sail. The Mantus quick-set anchor is stowable and breaks down for easy storage, so you can store one or two as spares without needing to take up much boat space.


Reinforcement fins on the shank
→ strengthen shank + improve holding power + increase resistance to dragging.

Nose reinforcement/keel
→ prevents bending, distributes load, protects assembly.

Lateral foils
→ improve soft mud performance by reorienting anchor for deeper set.

Retrieval Hole: Used to rig emergency retrieval line or tandem anchor set up.

Shank: Uses Hi Test Steel, Yield Strength 690 Mpa. Shank is inserted into the shank boot and then is welded from above and below.

Shank/Fluke Bolted Joint: Four Grade-5 bolts, Each stronger than the appropriate size chain.

Machined chisel nose is optimized for best penetration

BUILT STRONG

  • Formed out of high-quality steel plate. Contains no cast parts.
  • Shank and shank boot are welded from top and bottom.
  • Shank and roll bar are bolted to the fluke.
  • ASTM certified steel bolts are oversized with a large margin to ensure safety.
  • Although the shank is attached to the fluke with 4 bolts, a single bolt has sufficient strength to handle the maximum expected load on the anchor. Bolt Details.
  • Stainless Steel anchors feature a 2205 Duplex shank and 316L stainless steel fluke. The surface is hardened by shot-peening and are then electro-polished to provide maximum corrosion resistance.
  • In the carbon steel version, every part of the anchor system is hot-dip galvanized for corrosion protection. (All shanks are HT ASTM 514 Steel and flukes are mild steel A36 equivalent)
  • Sharp-headed nose is precision machined to achieve the perfect chisel shape to achieve maximum penetrating power.

LIFE TIME WARRANTY Mantus Marine offers a lifetime warranty on its anchors (See below for details)

After the release of the Mantus M2 Model, we often get the question: which one is better?  Both Anchors have an amazing setting and resetting ability and both are excellent choices for a primary anchor, but each has its own small specific advantages.  Both anchors roll over well in most bottom conditions and it is rare for a properly weighted anchor to end up upside down. Nevertheless, M1 Anchor, due to its roll bar, is better at rolling over in a really soft, silty bottom. The M2 Anchor is less likely to get plugged up with muddy weeds, and without the need for the roll bar, M2 is less bulky. Thus, the M2 model provides a better fit for boats with bow pulpits with slotted anchor housing and bow sprits.

DIMENSIONS AND FIT

DIMENSIONS
(INCHES)
A B C D E F G H I J K L M
2.5 lbs17.26.62.92.05.03.72.912.20.30.816.39.610.2
8 lbs22.08.43.62.56.44.73.615.60.41.020.812.313.0
13 lbs26.810.24.43.17.85.74.419.00.41.225.415.015.8
17 lbs29.611.34.93.48.66.34.921.00.51.328.016.517.5
25 lbs32.012.25.33.79.36.85.322.70.51.530.317.918.9
35 lbs35.513.65.94.110.37.55.925.20.61.633.719.921.0
45 lbs39.915.36.64.611.68.56.628.40.71.837.922.423.6
55 lbs42.716.37.14.912.49.17.130.40.71.940.523.925.3
65 lbs45.517.47.55.213.29.77.532.30.72.143.225.526.9
85 lbs48.318.58.05.614.010.28.034.30.82.245.827.028.6
105 lbs52.320.08.76.015.211.18.737.20.92.449.629.331.0
125 lbs56.321.59.36.516.311.99.340.00.92.653.431.533.3
160 lbs59.122.69.86.817.112.59.842.01.02.756.133.135.0
190 lbs63.924.410.67.418.513.610.645.41.02.960.635.837.8
220 lbs68.326.111.37.919.814.511.348.51.13.164.838.240.4
DIMENSIONS
(MILLIMETERS)
A B C D E F G H I J K L M
1kg43716773501279372311720415245259
4 kg558213926416211892396925529312330
6 kg680260113781971441124831131645380402
8 kg751287124862171591245331234712420444
11 kg812310135932351721345761337770454480
16 kg9033451501042621911496411541856505534
21 kg10143871681172942151687211746962568600
25 kg108541418012531423018077118491030607642
30 kg115744219213333524519182119531097647684
39kg122846920314135626020387220561164687726
48 kg132950722015338528222094422611260744786
57kg1430546237165414303237101623651357800846
73 kg1501573249173435318248106624681424840888
86 kg1623620269187470344269115326741539908960
100 kg1736629205037291233816597103
Anchor SizeDay Anchorrecommended for winds < 30 knotsCruising Anchorrecommended for winds < 50 knotsStorm Anchorrecommended for winds > 50 knots
2.5 lbs0-16 < 1000 lbs
8 lb16-20 feet < 3,000 lbs 12-14 feet < 1000 lbs0-12 feet < 800 lbs
13 lb20-25 feet < 5,000 lbs14-20 feet < 3000lbs 12-14 feet <1000 lbs
17 lb25-30 feet < 11,000 lbs 20-25 feet < 5,000 lbs14 -20 feet < 3000 lbs
25 lb30-35 feet < 15,000 lbs25-30 feet < 11,000 lbs20-25 feet < 5000 lbs
35 lb35-39 feet < 20,000 lbs30-35 feet < 15,000 lbs25-30 feet < 11,000 lbs
45 lb39-43 feet < 30,000 lbs35-39 feet < 20,000 lbs30-35 feet < 15,000 lbs
55 lb43-45 feet < 40,000 lbs 39-43 feet < 30,00035-39 feet < 20,000 lbs
65 lb45-50 feet < 50,000 lbs43-45 feet < 40,000 lbs39-43 feet < 30,000 lbs
85 lb50-60 feet < 60,000 lbs45-50 feet < 50,000 lbs43-45 feet < 40,000 lbs
105 lb60-70 feet < 70,000 lbs50-60 feet < 60,000 lbs45-50 feet < 50,000 lbs
125 lb70-85 feet < 100,000 lbs60 -70 feet < 70,000 lbs50-60 feet < 60,000 lbs
160 lbs85-90 feet < 130,000 lbs70 – 85 feet < 100,000 lbs60-70 feet < 70,000 lbs
190 lbs90 -95 feet < 140,000lbs 85-90 feet < 130,000 lbs70-85 feet < 100,000 lbs
220 lbs95 -100 feet < 150,00090 – 95 feet < 140,000lbs 85-90 feet < 130,000 lbs
 Anchor Size Day Anchorrecommended for winds < 30 knotsCruising Anchorrecommended for winds < 50 knotsStorm Anchorrecommended for winds > 50 knots
2.5 lb/ 1 kg0- 5 m < 460 kg
8 lb/ 3.5 kg5-6 m < 1300 kg0 – 5 m < 460 kg0 – 3.6 m < 360 kg
13 lb/ 6 kg6-7.5 m < 2300 kg5-6 m < 1300 kg0-5 m < 460 kg
17 lb/ 8 kg7.5 – 9m < 5000 kg6 – 7.5 m <2300 kg5 – 6 m < 1300 kg
25 lb/ 11.4 kg9 – 10.6 m < 6,800 kg7.5 – 9 m < 5,000 kg6 – 7.5 m < 2300 kg
35 lb/ 15 kg10.6 -12 m < 9,090 kg9 – 10.6 m < 6,800 kg7.5 – 9 m < 5000 kg
45 lb/ 20 kg12 – 13 m < 13,600 kg10.6 – 12 m < 9,090 kg9 – 10.6 m < 6,800 kg
55 lb/ 25 kg13 – 13.5 m < 18,200 kg12 – 13 m < 13,600 kg10.6 – 12 m < 9,090 kg
65 lb/ 30 kg13.5-15.2 m < 23,000 kg13 -13.5 m < 18,200 kg12 -13 m < 13,600 kg
85 lb/ 39 kg15.2 -18.2 m < 27,000 kg13.5 -15.2 m < 23,000 kg13 – 13.5 m < 18,200 kg
105 lb/ 48 kg18.2-21.2 m < 32,000 kg15.2 – 18.2 m < 27,000 kg13.5 – 15.2 m < 23,000 kg
125 lb/ 57 kg21.2 -25.8 m < 45,000 kg18.2 – 21.2 m < 32,000 kg15.2 – 18.2 m < 27,000 kg
160 lb/ 73 kg25.8 – 27.3 m < 59,000 kg21.2 -25.8 m < 45,000 kg18.2 – 21.2 m< 32,000 kg
190 lb/ 86 kg27.3 – 28.8 m < 63,000 kg25.8 – 27.3 m < 59,000 kg21.2 -25.8 m < 45,000 kg
220 lb/ 100kg28.8 -30.3 m < 68,000 kg27.3 – 28.8 m < 63,000 kg25.8 – 27.3 m < 59,000 kg

ANCHOR SIZING GUIDE

Use the following guide to determine what size of anchor to use: 

When making sizing recommendations for a working anchor we are generally referring to the needs of a cruising boat spending most of its time on anchor, in doing so we try to envelope high sustained winds (40 kts) and assume poor holding conditions (low viscosity bottoms). Some may think these recommendations to be too conservative especially when compared to sizing tables from other manufacturers. Companies often make claims of superior anchor efficiency, stating that their small anchor X will outperform a much heavier anchor from their competitors and often use sizing charts as a marketing tool to that end, recommending anchors and anchor systems that are dangerously undersized for their intended use. Comparing surface area can be a good judge for potential holding capability. Our anchor sizing recommendations are presented in the table below and we divided in three categories: Lunch Anchor category is recommended for lighter use, expected winds under 25 knots, working anchor for winds under 40 knots and finally, storm anchor recommendations are intended for winds up to 60 knots. These recommendations are made assuming the worst-case scenario, a poor holding bottom and thus may seem conservative but we believe are accurate.

OUR WARRANTY

The Full Warranty can be read here.

The short version: Mantus anchors are warrantied for the LIFETIME of the original purchaser. If an anchor becomes damaged we will ship a replacement part – shank, fluke or roll-bar. The galvanized coating on anchors is covered for 3 years from date of purchase.

CONSTRUCTION GUIDE

Bolts, Washers and Nuts are provided with every Mantus Anchor. In the event of replacing a lost fastener, please make sure to always use proper size. Always use locking washers, or nylon lock nuts, and tighten the nut securely. Click here to download a printable pdf of the assembly instructions. Mantus Anchor Assembly Instructions
Anchor ModelBOLT OD (IN)BOLT LENGTH (IN)PACKAGE INCLUDES:
8 lbs1/4"0.75"6 BOLTS, NUTS, COMPRESSION WASHERS
13 lbs3/8"16 BOLTS, NUTS, COMPRESSION WASHERS
17 lbs3/8"1.1256 BOLTS, NUTS, COMPRESSION WASHERS
25 lbs3/8"1.1256 BOLTS, NUTS, COMPRESSION WASHERS
35 lbs1/2"1.3756 BOLTS, NUTS, COMPRESSION WASHERS
45 lbs1/2"1.3756 BOLTS, NUTS, COMPRESSION WASHERS
55 lbs1/2"1.3756 BOLTS, NUTS, COMPRESSION WASHERS
65 lbs5/8"1.56 BOLTS, NUTS, COMPRESSION WASHERS
85 lbs5/8"1.756 BOLTS, NUTS, COMPRESSION WASHERS
105 lbs5/8"1.756 BOLTS, NUTS, COMPRESSION WASHERS
125 lbs3/4"1.756 BOLTS, NUTS, COMPRESSION WASHERS
160 lbs3/4"26 BOLTS, NUTS, COMPRESSION WASHERS
190 lbs3/4"26 BOLTS, NUTS, COMPRESSION WASHERS
220 lbs3/4"26 BOLTS, NUTS, COMPRESSION WASHERS

RETURN POLICY

Mantus Marine stands behind its products and wants you to be completely satisfied. If you find that a product does not meet your expectations, or does not work for your application, please contact us as soon as possible so we can work out a solution for you. Please keep all anchor boxes and original packaging until you are sure you want to keep the product. Shipping fees will be deducted from returns. We apologize, but used products cannot be returned. 

Customers that purchased via another sales channel, should contact the relevant store to initiate the return process.

RETURNS

CALL US WITH ANY QUESTIONS

WITHIN THE US: 1-855-262-6887
BEYOND THE US: 469-226-3468 / 469-878-4083

CALL US WITH ANY QUESTIONS:
WITHIN THE US: 1-855-262-6887
BEYOND THE US: 469-226-3468 / 469-878-4083

More Mantus Products

Download the Mantus Catalog

Download the Mantus Catalog