Harken 57mm High Load Footblock with Lockoff – Black Magic Air (3221)
Secure, low-friction line redirection with temporary sheet holding capability
The Harken 57mm High Load Footblock with Lockoff (3221) from the Black Magic® Air series is designed to redirect high-load lines along the deck while offering the added functionality of a temporary lockoff, ideal for pausing adjustments or holding sheets during manoeuvres.
Built for offshore performance and longevity, it features Hard Lube-anodised sideplates and sheaves for enhanced UV protection and reduced surface wear. Inside, Torlon® roller bearings run on a precision centre cage, ensuring consistent, low-friction operation even under extreme loads by keeping the rollers aligned and separated.
The integrated lockoff mechanism provides a quick, secure hold without the need for a dedicated cleat, streamlining deck layouts. Designed for flush mounting, it accepts both metric and imperial flathead fasteners, all of which are concealed for a clean, snag-free finish.
A dependable choice for mainsheet leads, runners, or halyard redirection, the 3221 offers high-load handling with added versatility for tactical trimming and control.
Specifications
| Length (mm) | 84 |
| Recommended line - Max Ø (mm) | 12 |
| Sheave Ø (mm) | 57 |
| SWL (kg) | 1134 |
| NBL (kg) | 2268 |
| Weight (g) | 154 |
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