Mantus M2 Anchor
The best setting and holding boat anchor you can buy!
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 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.
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.
- 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.
LIFETIME WARRANTY
Mantus Marine offers a lifetime warranty on its anchors (See below for details)
WHICH IS BEST? THE M1 OR THE M2?
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.
SEE THE TESTS AND DECIDE FOR YOURSELF!
Click here to see a variety of independent tests and our own testing.
M2 Dimensions and Fit
M2 Mantus Dimensions (Imperial) Inches
A | B | C | D | E | F | G | H | I |
|
|---|---|---|---|---|---|---|---|---|---|
| 8lbs | 20 | 12 | 12 | 5 | 6 | 1 | 0 | 14 | 10 |
| 13lbs | 23 | 14 | 14 | 6 | 7 | 1 | 0 | 16 | 11 |
| 17lbs | 26 | 16 | 15 | 7 | 8 | 1 | 0 | 18 | 13 |
| 25lbs | 29 | 18 | 17 | 8 | 9 | 1 | 1 | 20 | 14 |
| 35lbs | 32 | 19 | 19 | 8 | 10 | 2 | 1 | 22 | 16 |
| 45lbs | 35 | 21 | 20 | 9 | 11 | 2 | 1 | 24 | 17 |
| 55lbs | 37 | 23 | 22 | 10 | 11 | 2 | 1 | 26 | 18 |
| 65lbs | 39 | 24 | 23 | 10 | 11 | 2 | 1 | 27 | 19 |
| 85lbs | 43 | 27 | 25 | 11 | 13 | 2 | 1 | 30 | 21 |
| 105lbs | 46 | 28 | 27 | 12 | 14 | 2 | 1 | 31 | 22 |
| 125lbs | 50 | 31 | 29 | 13 | 15 | 2 | 1 | 34 | 24 |
| 155lbs | 52 | 32 | 31 | 14 | 16 | 3 | 1 | 36 | 26 |
| 175lbs | 55 | 34 | 33 | 14 | 17 | 3 | 1 | 38 | 27 |
M2 Mantus Dimensions (Metric) mm
A | B | C | D | E | F | G | H | I |
|
|---|---|---|---|---|---|---|---|---|---|
| 3.6kg | 516 | 317 | 304 | 135 | 159 | 25 | 9 | 354 | 253 |
| 5.9kg | 591 | 363 | 348 | 155 | 182 | 29 | 10 | 406 | 290 |
| 7.7kg | 656 | 403 | 387 | 172 | 202 | 32 | 12 | 451 | 322 |
| 11.4kg | 731 | 449 | 431 | 191 | 225 | 36 | 13 | 503 | 359 |
| 15.9kg | 806 | 495 | 476 | 211 | 248 | 40 | 14 | 554 | 395 |
| 20.5kg | 882 | 541 | 520 | 231 | 271 | 43 | 16 | 606 | 432 |
| 25.0kg | 947 | 582 | 559 | 248 | 292 | 47 | 17 | 651 | 464 |
| 29.5kg | 994 | 610 | 586 | 260 | 306 | 49 | 18 | 683 | 487 |
| 38.6kg | 1097 | 674 | 647 | 287 | 338 | 54 | 19 | 754 | 538 |
| 47.7kg | 1163 | 714 | 686 | 304 | 358 | 57 | 21 | 799 | 570 |
| 56.8kg | 1266 | 777 | 747 | 331 | 390 | 62 | 22 | 870 | 621 |
| 70.5kg | 1332 | 818 | 785 | 349 | 410 | 66 | 24 | 915 | 653 |
| 79.5kg | 1407 | 864 | 830 | 368 | 433 | 69 | 25 | 966 | 690 |
Anchor Sizing
Mantus Anchor Sizing
M2 Anchors
| M2 Anchor Size (Imperial) | Lunch anchor for winds < 30 knots | Cruising anchor for winds < 50 knots | Storm anchor for winds > 50 knots | Blade Surface Area (inches sq) |
|---|---|---|---|---|
| 8 lbs | 16-20 ft < 3,000 lbs | 0-16 ft < 1,000 lbs | 0-12 ft < 800 lbs | 63 |
| 13 lbs | 20-25 ft < 5,000 lbs | 16-20 ft < 3,000 lbs | 12-16 ft < 1,000 lbs | 82 |
| 17 lbs | 25-30 ft < 11,000 lbs | 20-25 ft < 5,000 lbs | 16-20 ft < 3,000 lbs | 102 |
| 25 lbs | 30-35 ft < 15,000 lbs | 25-30 ft < 11,000 lbs | 20-25 ft < 5,000 lbs | 126 |
| 35 lbs | 35-39 ft < 20,000 lbs | 30-35 ft < 15,000 lbs | 25-30 ft < 11,0000 lbs | 154 |
| 45 lbs | 39-43 ft < 30,000 lbs | 35-39 ft < 20,000 lbs | 30-35 ft < 15,000 lbs | 183 |
| 55 lbs | 43-45 ft < 50,000 lbs | 39-43 ft < 30,000 lbs | 35-39 ft < 20,000 lbs | 212 |
| 65 lbs | 45-50 ft < 50,000 lbs | 43-45 ft < 40,000 lbs | 39-43 ft < 30,000 lbs | 233 |
| 85 lbs | 50-60 ft < 60,000 lbs | 45-50 ft < 50,000 lbs | 43-45 ft < 40,000 lbs | 284 |
| 105 lbs | 60-70 ft < 70,000 lbs | 50-60 ft < 60,000 lbs | 45-50 ft < 50,000 lbs | 319 |
| 125 lbs | 70-80 ft < 100,000 lbs | 60-70 ft < 70,000 lbs | 50-60 ft < 60,000 lbs | 378 |
| 155 lbs | 80-90 ft < 110,000 lbs | 70-80 ft < 100,000 lbs | 60-70 ft < 70,000 lbs | 419 |
| 175 lbs | 90-100 ft < 130,000 lbs | 80-90 ft < 110,000 lbs | 70-80 ft < 100,000 lbs | 467 |
| M2 Anchor Size (Metric) | Lunch anchor for winds < 30 knots | Cruising anchor for winds < 50 knots | Storm anchor for winds > 50 knots | Blade Surface Area |
|---|---|---|---|---|
| 3.5 kg | 5-6 m < 1,300 kg | 0-5 m < 460 kg | 0-3.6 m < 360 kg | 405 |
| 6 kg | 6-7.5 m < 2,300 kg | 5-6 m < 1,400 kg | 3.6-5 m < 460 kg | 532 |
| 8 kg | 7.5-9 m < 5,000 kg | 6-7.5 m < 2,300 kg | 5-6 m < 1,400 kg | 656 |
| 11.4 kg | 9-10.6 m < 6.800 kg | 7.5-9 m < 5,000 kg | 6-7.5 m < 2,300 kg | 815 |
| 15 kg | 10.6-12 m < 9,090 kg | 9-10.6 m < 6,800 kg | 7.5-9 m < 5,000 kg | 991 |
| 20 kg | 12-13 m < 13,600 kg | 10.6-12 m < 9,090 kg | 9-10.6 m < 6,800 kg | 1183 |
| 25 kg | 13-13.5 m < 23,000 kg | 12-13 m < 13,600 kg | 10.6-12 m < 9,090 kg | 1366 |
| 30 kg | 13.5-15.2 m < 23,000 kg | 13-13.5 m < 18,200 kg | 12-13 m < 13,600 kg | 1505 |
| 39 kg | 15.2-18.2 m < 27,000 kg | 13.5-15.2 m < 23,000 kg | 13-13.5 m < 18,200 kg | 1834 |
| 48 kg | 18.2-21.2 m < 32,000 kg | 15.2-21.2 m < 27,000 kg | 13.5-15.2 m < 23,000 kg | 2059 |
| 57 kg | 21.2-24.2 m < 45,500 kg | 18.2-21.2 m < 32,500 kg | 15.2-18.2 m < 23,000 kg | 2441 |
| 70 kg | 24.2-27.3 m < 50,000 kg | 21.2-24.2 m < 45,500 kg | 18.2-21.2 m < 32,500 kg | 2701 |
| 80 kg | 27.3-30.3 m < 59,000 kg | 24.2-27.3 m < 50,000 kg | 21.2-24.2 m < 45,500 kg | 3014 |
Anchor Sizing Guide
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 (50 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.
However, 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 – even 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 divided in three categories:
- Lunch Anchor category is recommended for lighter use, expected winds under 30 knots
- Working anchor for winds under 50 knots
- Storm anchor recommendations are intended for winds above 50 knots.
These recommendations are all made assuming the worst-case scenario, a poor holding bottom and therefore may seem conservative but we believe are accurate.
M2 Anchor Assembly Details
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.
M2 Assembly Guide
Click here for an assembly video guide of the M2 anchor.
Warranty and Returns Policy
This is a genuine LIFETIME guarantee and if you are dissatisfied with any Mantus product at any time we will give you a replacement or refund.
With the anchors we will give you a replacement part – for example a roll-bar, fluke or shank.
Exceptions
- We will not normally replace the bridle line which will slowly degrade in normal use as would any other bridle line
- The galvanised coating on the anchor carries a 3 year warranty
In the first instance please contact us via [email protected] explaining the problem and giving your contact details and we will get in touch to resolve it with you.
