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Description
Fortress Fx-7 4lb Anchor For 16-17' BoatsThe Legendary Fortress Anchor In test after test, from coast to coast and from around the world, no anchor in history has been called ? The World? s Best Anchor? by more boaters and respected marine experts than Fortress and for good reason. Years of research and development, high tech materials and manufacturing and thousands of real world tests are your assurance of performance, quality, and value. Fortress weighs only half as much as heavier steel
The Legendary Fortress Anchor
In test after test, from coast to coast and from around the world, no anchor in history has been called ?The World?s Best Anchor? by more boaters and respected marine experts than Fortress...and for good reason.
Years of research and development, high-tech materials and manufacturing and thousands of real world tests are your assurance of performance, quality, and value. Fortress weighs only half as much as heavier steel anchors and yet outperforms them all.
Why? Because the Fortress design does not depend upon weight to provide world class performance. All this adds up to your best value in anchoring safety and convenience.
| Feature | Benefit |
| Precision-machined from an aluminum alloy that is as strong as steel, but only half the weight. |
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| Can be disassembled |
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| Lifetime Parts Replacement Warranty |
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| Adjustable 32 to 45 fluke angle |
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| Tough anodized finish |
|
| FORTRESS SELECTION GUIDE | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| Boat Length | |||||||||
| ft | 16'-27' | 28'-32' | 33'-38' | 39'-45' | 46'-51' | 52'-58' | 59'-68' | 69'-150' | |
| m | 5-8 | 8-10 | 10-12 | 12-14 | 14-15 | 16-18 | 18-21 | 21-46 | |
| Weight | lb | 4 | 7 | 10 | 15 | 21 | 32 | 47 | 69 |
| kg | 1.8 | 3.2 | 4.5 | 6.8 | 9.5 | 14.4 | 21.2 | 31.1 | |
| Replaces Steel Anchors | lb | 6-9 | 10-13 | 14-18 | 19-28 | 33-50 | 50-65 | 70-90 | 100-170 |
| kg | 3-4 | 5-6 | 6-8 | 9-13 | 15-23 | 23-29 | 32-41 | 45-77 | |
| HOLDING POWER | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| Working Load | |||||||||
| lb | 700 | 900 | 1.250 | 2,000 | 3,000 | 4,000 | 5,250 | 6,750 | |
| kg | 318 | 408 | 567 | 907 | 1,351 | 1,814 | 2,381 | 3,062 | |
| 32 Degree Hard Sand Holding Power | lb | 2,800 | 3,600 | 5,000 | 8,000 | 12,000 | 16,000 | 21,000 | 27,000 |
| kg | 1,270 | 1,633 | 2,268 | 3,629 | 5,443 | 7,258 | 9,536 | 12,247 | |
| 45 Degree Soft Mud Holding Power | lb | 840 | 1,080 | 1,500 | 2,400 | 3,600 | 4,800 | 6,300 | 8,100 |
| kg | 381 | 490 | 680 | 1,089 | 1,633 | 2,177 | 2,858 | 3,674 | |
| 32 Degree Soft Mud Holding Power | lb | 420 | 540 | 750 | 1,200 | 1,800 | 2,400 | 3,150 | 4,050 |
| kg | 191 | 245 | 340 | 544 | 816 | 1,089 | 1,429 | 1,837 | |
| DIMENSIONS | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| "A" Shank Length | |||||||||
| in | 24" | 27" | 31" | 36" | 40" | 46" | 51" | 56" | |
| mm | 610 | 685 | 787 | 914 | 1,016 | 1,168 | 1,295 | 1,422 | |
| "B" Fluke Length | in | 14" | 16" | 18" | 21" | 24" | 27" | 30" | 33" |
| mm | 356 | 406 | 457 | 533 | 610 | 686 | 762 | 838 | |
| "C" Stock Length | in | 19" | 22" | 25" | 29" | 32" | 37" | 41" | 45" |
| mm | 483 | 559 | 635 | 737 | 813 | 940 | 1,041 | 1,143 | |
| SUPPORT HARDWARE | |||||||||
| Model | FX-7 | FX-11 | FX-16 | FX-23 | FX-37 | FX-55 | FX-85 | FX-125 | |
| Proof Coil Chain | |||||||||
| in | 3/16" | 1/4" | 5/16" | 3/8" | 3/8" | 1/2" | 1/2" | 1/2" | |
| mm | 5 | 6 | 8 | 9 | 9 | 13 | 13 | 13 | |
| Nylon Rope** | in | 3/8" | 3/8" | 1/2" | 5/8" | 3/4" | 7/8" | 1" | 1 1/4" |
| mm | 9 | 9 | 13 | 16 | 19 | 22 | 25 | 32 | |
| Shackle Size | in | 1/4" | 1/4" | 5/16" | 3/8" | 7/16" | 1/2" | 5/8" | 5/8" |
| mm | 6 | 6 | 8 | 10 | 12 | 12 | 16 | 16 | |
| NOTE: Hard sand holding power figures above represent loads actually achieved on production FORTRESS and Guardian anchors under controlled horizontal pull conditions without dragging or resulting in disabling structural deformation. ** Rope recommendations are based on 25% of breaking strength. Rope must be in good condition. |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 1311 reviews
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Product Reviews
★★★★★ 5
STRONG AS A MONSTER (albeit a cute one)
Color: Large - Billy the Beast Monster, Color: Large - Billy the Beast Monster
My aggressive chewer ate the adorable monster's ear off on the first day, but who cares? The body of the monster has been indestructible so far (one week). My 7 month old pup cbews it for a good 10-15 minutes at a time several times per day. Great quality product and outlasting all the other toys I bought (which she destroyed in 10 minutes - even the ones rated "Level 4 toughness" from Walmart. I think it's hilarious in my photo that the monster's expression perfectly shows his disappointment about missing an ear, LOL.
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Reviewed in the United States on June 3, 2026
★★★★★ 5
King has met his match.
Color: Large - Billy the Beast Monster
I received my dog's toy this evening when I place the toy on the ground my dog King went crazy. He is a one-year-old Pitbull and love to tackle any toy he believes he can't take down, but Mr King has met his match with this toy. He was using all of his bite force to demolish the toy but the toy actually has worn him out. He ran around my yard for about 30 minutes with the toy in his mouth producing the squeaking sound from the toy as well. Hold up the toy is totally filthy with dirt almost covering the entire green and yellow belly of the toy. I have brought king mini toys in the last couple of months and this is the best toy that holds up to his energy level. I tried to retrieve the toy and place it in his dog house because it is far beyond his bedtime, but he wanted to play catch me if You can with my new toy. This is a great toy for those big energetic dogs that love to take their aggression out on maybe some furniture or perhaps that favorite shoe you do not want them to chew on. I am totally sold on this toy I brought from the seller who placed the items on the Amazon site. I plan on purchasing a another toy from the buyer to keep King energy at a low level if I can. I just checked on my dog and he actually has taken the toy with him inside of his dog house and now the toy is snugged under his left paw. I'm one of those smart owners I'm not going to even try to take it from him tonight but hopefully in the next week I can sneak it from him and it may be perhaps wash it. I did this item AA Plus
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Reviewed in the United States on January 31, 2026
★★★★★ 3
Cute, but not Maligator-proof!
Color: Small - Towering Timmy Monster, Color: Small - Towering Timmy Monster
Fun toy while it lasts. My Belgian Malinois made quick work of this little guy but still enjoys playing with its carcass. Bite Force* but not taking into account the bite force of a Mali-gator!
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Reviewed in the United States on May 7, 2026
★★★★★ 5
Puppy Love
Color: Small - the Goofy Monster, Color: Small - the Goofy Monster
Short backstory.... My daughter moved in with her 3 dogs recently and brought her dogs toys. Over the course of the last 3 months, my dogs have managed to steal every last toy they could find.
fast forward to purchasing this Blue Monster. It came today and was immediately grabbed by one of my dogs. She refused to give it up even for her favorite ball. Ten minutes later another dog had the baby monster and was not giving it up!!!! (think growling) I thought that I would put the monster up for the night to allow for some sleep but it felt like it had been soaked in slobber ( I am sure I saw it drip ;) ). My dogs seems to think this little blue monster is their one true love.
Now for some facts.
1. Baby monster is quite small in comparison to my other Bite Force dog toys. It is not too small for my dogs but it is definitely not a size I would give to my daughters Pit that thinks she is a vacuum.
2. Squeaker lasted about 2 minutes before my dog drool invaded it. Currently no squeaky sounds can be heard...just slightly squishy sounds
3. No holes despite my dogs trying. There has been constant chewing (by Standard Poodles) on this little guy for the last 5 hours and not one little open area. Trust me this is a huge accomplishment. Stuffies last 10 seconds in this house.
If you need a toy that will last longer than most I highly recommend Bite Force. The are designed for tough chewers and take a beating
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Reviewed in the United States on November 11, 2025
★★★★★ 2
My raptor GSP destroyed this dino toy
Color: Medium - Dilophosaurus, Color: Medium - Dilophosaurus
My dog ripped this toy apart faster than the trex did the lawyer in Jurassic Park. 2 hours! Arm was ripped off, stuffing pulled out methodically over the next to days. Now it is a gutless husk. The metor was kinder to the og dinos than my gsp was to this. Sorry Bite Force. Open to product sampling tho!
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Reviewed in the United States on May 19, 2026