M1 Mantus Anchor


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.

EASY TO STORE The Mantus 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 breaks down for easy storage, so you can store one or two as spares without taking up much needed boat space.



  • 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 then electro-polished to provide maximum corrosion resistance.
  • In the carbon steel version every part of the anchor system is hot-dipped 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.


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 the 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 anchor provides a better fit for boats with bow pulpits; with slotted anchor housing; and bow sprits.


LIFE TIME WARRANTY Mantus Anchors offers a lifetime warranty on its anchors *see Warranty section for details.

Mantus Anchor Details

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Mantus Anchor Dimensions (inches)
8 lbs 12.2 15.6 13 19 6.8 7.9
13 lbs 14.8 19 15.9 23 8.3 9.6
25 lbs 17.7 22.7 19 27.5 9.8 11.4
35 lbs 19.7 25.3 21.1 31 11 12.5
45 lbs 22.1 28.4 23.7 34.3 12.3 14.3
65 lbs 25.2 32.4 27 39.1 14 16.3
85 lbs 26.7 34.4 28.7 41.5 14.9 17.3
105 lbs 29 37.2 31 45 16.1 18.7
125 lbs 31.2 40 33.4 48.4 17.4 20.2
175 lbs 35.4 45.44 37.92 54.88 19.68 23
Mantus Anchor dimensions (mm)
3.6 kgs 310 396 330 482 172 200
5.9 kgs 376 483 404 584 210 244
11.4 kgs 450 577 482 698 249 290
15.9 kgs 500 642 536 787 279 318
20.5 kgs 561 721 602 871 312 363
29.5 kgs 640 823 685 993 356 414
38.6 kgs 678 874 729 1054 378 440
47.7 kgs 736 945 787 1143 408 474
56.8 kgs 792 1016 848 1229 441 513
79.5 kgs 899 1154 963 1393 499 584

[tab name=”Anchor Sizing”]Sizing recommendations are designed for the average cruiser who lives aboard & must be prepared to ride out storms at anchor. Day sailors may consider sizing down.


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 are 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 worse case scenario, a poor holding bottom and thus may seem conservative but we believe are accurate.

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


Metric Sizing Guide (click to enlarge)

Imperial Sizing Guide (click to enlarge)

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Mantus anchors provides a lifetime warranty on its products and parts against damage or manufacturing defects. LIFETIME. If at anytime you are dissatisfied with our product please contact us for a replacement or refund. If an anchor becomes damaged we will ship a replacement part – shank, fluke or roll-bar. (Only exception is the Bridle line which naturally degrades with age and normal use. Anything outside of normal wear-and-tear is fully covered by our warranty.)
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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.

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 25lbs 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 65 lbs 5/8 6 bolts, nuts, lock washers
Mantus 85 lbs 5/8 6 bolts, nuts, lock washers
Mantus 105 lbs 5/8 6 bolts, nuts, lock washers
Mantus 125 lbs 3/4 6 bolts, nuts, lock washers

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Mantus Anchors. The best anchor in the world. Period.

That is a pretty bold statement to make. We have tested Mantus against every other popular marine anchor on the market, and this is the conclusion we have arrived at. But don’t take our word for it. Order a Mantus today and try for yourself. We offer a lifetime warranty. That’s right. LIFETIME. Try our anchor or any of our products and if you aren’t completely satisfied, simply contact us for a full refund! If at anytime the anchor becomes damaged, simply contact us and we will ship a replacement part.[/tab][end_tabset]

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