The Fortress FX-11 7LB Anchor is the trusted workhorse for 28–32 ft boats and is renowned as The Worlds Best Anchor by boaters and marine experts worldwide. Built to endure years of testing, it combines advanced Fortress design with lightweight handling for coastal cruising, protected bays, and open-water adventures.
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Weight: 7 lb (3.2 kg)
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Boat Length Range: 28'–32' (8–10 m)
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Material: Precision-machined aluminum alloy — as strong as steel, but only half the weight; rustproof and corrosion-resistant finish.
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Holding Power (Hard Sand): 3,600 lb (1,633 kg) at 32° hard sand
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Holding Power (Soft Mud): 1,080 lb (490 kg) at 45° soft mud
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Holding Power (Soft Mud, 32°): 540 lb (245 kg)
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Fluke Angle: Adjustable 32°–45° fluke angle — exclusive feature dramatically increasing holding power in soft mud bottoms
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Disassemblable: Easily disassembled for compact storage or use as a spare/storm anchor
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Warranty: Lifetime Parts Replacement Warranty — free replacement of any damaged anchor part, forever*
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Finish: Tough anodized finish for durability and a handsome, corrosion-resistant appearance
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Value Proposition: Replaces steel anchors with advanced Fortress technology, reducing weight without sacrificing performance
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Designed For: Perfectly matched to boats in the 28–32 ft range, delivering reliable holding power, easy manageability, and a compact footprint designed for typical crewed and single-handed docking
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Patented Design: Features a patented design with rugged anodized finish and robust support hardware for coastal cruising, protected bays, and open-water adventures
The FX-11 delivers strong, reliable holding while keeping weight down, making anchoring and retrieval easier for both crew and solo boaters. Its aluminum alloy construction provides durability without the bulk of steel, and the rustproof, corrosion-resistant finish stands up to saltwater use. The adjustable fluke angle enhances grip in soft bottoms, while the disassemblable design simplifies storage and allows it to serve as an extra or storm anchor. A lifetime Parts Replacement Warranty offers long-term peace of mind, and the anchor’s compact footprint is well suited to 28–32 ft boats for confident docking in varied conditions.
| Feature | Benefit |
Precision-machined from an aluminum alloy that is as strong as steel, but only half the weight. | - Easy to manage weight
- Rustproof
- Sharper than heavy, dull-edged steel anchors
- Will set faster and penetrate deeper into common sea bottoms for incredible holding power
|
| Can be disassembled | - Excellent as a spare or storm anchor
- Easy to store
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| Lifetime Parts Replacement Warranty | - Free replacement of any damaged anchor part...Forever!*
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| Adjustable 32 to 45 fluke angle | - Exclusive and patented feature which dramatically increases holding power in problem soft mud bottoms
|
| Tough anodized finish | - Handsome and durable appearance
- Corrision resistant
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| 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. |
