Fast-setting anchor
Curved lead-filled tip, hollow shank and concave surfaces support penetration and holding as load rises.
Stainless-steel anchoring equipment for demanding installations
ULTRA Anchor, Side Pocket Anchor, cromox® stainless chain, swivels, bow rollers and accessories are presented as a complete system: correctly sized anchor, compatible chain size, safe connection and clean bow recovery.
5–360 kg / 11–800 lbsULTRA Anchor range
up to 186 ftVessel reference
DIN / ISO / AS / G4cromox® chains
cromox® since 2026EU distribution
How the anchoring set is built
Real confidence at anchor comes from geometry, materials and compatibility working together.
ULTRA Anchor is developed to set quickly and build holding power under load; cromox® chain adds smooth running and high strength; the swivel and bow roller handle orientation, friction and safe seating at the bow.
Chain that runs smoothly on the windlass
cromox® chain is tested, calibrated and bright polished; no zinc burrs, with higher breaking load than comparable galvanized chains.
Swivel for correct seating
ULTRA Flip Swivel connects chain and anchor without an extra shackle, while the flip geometry helps the anchor recover right-side-up on the bow roller.
Bow roller for a clean bow
Bow, pulpit and sliding roller variants handle bow clearance, friction, jam-free movement and controlled deployment/recovery.
Brand background
Two family-run manufacturers with the same focus: engineering, quality and real use on the water.
ULTRA products trace back to Boyut Mechanical Industry and marine development from 2000, while Ketten Wälder/cromox® brings long experience in stainless-steel chains. Since 2026 cromox® is the European distribution partner for ULTRA Products.
1978Boyut Mechanical Industry
2000marine product development
2008cromox® registered
2026European distribution partnership
Warranty and registration
ULTRA Anchor includes a lifetime warranty against material defects including bending, breaking, cracking and rusting under manufacturer terms. For a concrete case, model, serial data and documentation are checked.
Range
From anchor to chain grab — everything in one place.
The range covers the complete anchoring setup: anchors, anchor chains, swivels, bow roller solutions, accessories and spare parts for a clean bow installation.
Anchors
ULTRA Anchor
Polished stainless anchor for fast setting, deep burial and stable holding when wind or tide shifts.
Anchors
ULTRA Side Pocket Anchor
Anchor for demanding yacht pocket installations, with geometry for fast bite, wide contact area and deep engagement.
Chains
cromox® Stainless Steel Chain
Tested, calibrated and bright-polished stainless chain for smooth running, better locker distribution and high breaking force.
Swivels
ULTRA Flip Swivel
One-piece machined 316Ti swivel with flip geometry for right-side-up recovery on the bow roller.
Swivels
ULTRA Classic Swivel
Compact chain-to-anchor connection where the goal is a clean stainless link, good articulation and easy inspection.
Accessories
ULTRALINE Flat Rope Reel
Compact stainless reel for clean storage of stern anchor lines, towlines or mooring line options from 40 to 100 m.
Bow rollers
ULTRA Bow Roller
Bow roller solution for proper anchor guidance, reduced friction and clean seating at the bow.
Bow rollers
ULTRA Pulpit Bow Roller
Pulpit version where the installation needs added position, clearance and integration with bow rail geometry.
Bow rollers
ULTRA Sliding Bow Roller
Single and double-stroke sliding system with stainless spring and Delrin wheels for added bow clearance and lower jamming risk.
Accessories
cromox® NAUTIC Shackle
Duplex stainless quick connection shackle for safety-critical links, with double-secured pin for controlled rotation.
Accessories
ULTRA Anchor Ring
Adds weight to the chain for a steadier short-scope setup and can help recover a fouled anchor.
Accessories
ULTRA Chain Grab / Trip Hook
Chain Grab relieves constant pull and chain noise; Trip Hook supports controlled recovery when crossed with foreign tackle.
cromox® stainless chain
Grade 60, Grade 60 PLUS and Superduplex options for real loads.
The cromox® chain range covers AISI 316L Grade 60, AISI 318LN Duplex Grade 60 PLUS, USA G4, AISI F255 Superduplex Grade 70 PLUS and stud-link options. For correct selection, the existing gypsy/windlass, chain norm and target length are matched together.
Chain length by conditions
up to 10 knots: about 5× depth up to 35 knots: about 7× depth over 35 knots: about 10× depth
| Type | Norm | Material | Available sizes / examples | Example breaking force |
|---|---|---|---|---|
| CDK / CIA Grade 60 | DIN 766 / ISO 4565 | AISI 316L | 6, 8, 10, 12, 13, 14, 16 mm | 8 mm: 63 kN · 10 mm: 100 kN |
| CXA / CXI / CXP Grade 60 PLUS | DIN 766 / ISO 4565 / AS 2321 | AISI 318LN Duplex | 5–26 mm ovisno o normi | 8 mm: 66 kN · 10 mm: 104 kN |
| CXUS Grade 60 PLUS | USA G4 | AISI 318LN Duplex | 1/4″, 5/16″, 3/8″, 1/2″, 5/8″, 1″ | 3/8″: 100 kN · 1/2″: 167 kN |
| CSX Grade 70 PLUS | DIN 766 | AISI F255 Superduplex | 8, 10 mm | 8 mm: 80 kN · 10 mm: 125 kN |
| CXSL Stud Link Grade 60 PLUS | ISO 1704 | AISI 318LN Duplex | 16, 19, 22, 26 mm | 22 mm: 450 kN · 26 mm: 640 kN |
Quick orientation for chain and scope
The guide helps quickly prepare the key selection data: vessel length, displacement, anchor weight, chain diameter and use profile.
| Anchor | Sail boat | Power boat | Chain Ø |
|---|---|---|---|
| 5 kg | 17 ft / 1.0 t | 17 ft / 1.1 t | 5 mm |
| 8 kg | 23 ft / 2.0 t | 24 ft / 2.2 t | 6 mm |
| 12 kg | 30 ft / 3.8 t | 31 ft / 4.2 t | 6 mm |
| 16 kg | 35 ft / 6.3 t | 36 ft / 6.9 t | 6–8 mm |
| 21 kg | 41 ft / 10.2 t | 43 ft / 11.2 t | 8 mm |
| 27 kg | 47 ft / 14.6 t | 48 ft / 16.0 t | 8–10 mm |
| 35 kg | 52 ft / 21.5 t | 54 ft / 23.5 t | 10 mm |
| 45 kg | 58 ft / 30.0 t | 60 ft / 32.9 t | 10–12 mm |
| 60 kg | 66 ft / 43.0 t | 68 ft / 47.1 t | 12–13 mm |
| 80 kg | 73 ft / 63.0 t | 75 ft / 69.0 t | 13 mm |
| 100 kg | 80 ft / 85.0 t | 83 ft / 93.0 t | 14 mm |
| 130 kg | 90 ft / 123.0 t | 93 ft / 135.0 t | 14–16 mm |
| 160 kg | 100 ft / 174.0 t | 103 ft / 191.0 t | 16 mm |
| 200 kg | 113 ft / 262.0 t | 116 ft / 287.0 t | 18 mm |
| 250 kg | 129 ft / 400.0 t | 133 ft / 438.0 t | 18–20 mm |
| 300 kg | 144 ft / 550.0 t | 149 ft / 600.0 t | 20 mm |
| 360 kg | 164 ft / 760.0 t | 169 ft / 830.0 t | 22 mm |
Technical details
Selection tables, geometry and images for quick checking.
ULTRA Anchor
ULTRA Anchor uses a curved tip, hollow shank, concave surfaces and wing plate details for penetration, holding power and stability when wind or tide shifts.
ULTRA Side Pocket Anchor
Side Pocket Anchor targets demanding bow-pocket installations, with Standard/Compact and balanced/unbalanced configurations.
Sliding Bow Roller
Bow, pulpit and sliding roller variants handle bow clearance, friction, jam-free movement and controlled deployment/recovery.
Images and details
Product gallery for anchor, chain, swivels, rollers and accessories.
Click an image for a larger view of products, geometry and details for comparing anchors, chains, swivels, rollers and accessories.
Video material
ULTRA anchoring in practice
See the ULTRA anchor in use, swivel orientation and clean bow recovery. For the correct set, send vessel details, windlass setup, chain size and intended use.
ULTRA Anchor system
cromox® / ULTRA equipment details
Cromox / UltraProducts inquiry
Send vessel details and receive a set recommendation.
For the best answer include: vessel type and length, displacement, existing windlass/gypsy, current chain diameter and norm, anchor weight, bow photos and use profile.
ULTRA Anchor
Side Pocket Anchor
cromox® chain
Swivels & Rollers
Accessories & Spare Parts