HARKEN 57mm Black Magic® Footblock, HL Double Footblock
Harken 57mm Black Magic® High-load double Footblock allows redirection of lines on the deck.
The entire line of Black Magic® AirBlocks® offer a sleek and polished look. Their unique performance engineering remains the staple of the Black Magic line of blocks. These strong, lightweight blocks feature free-rolling, high-load Torlon® roller bearings for a high strength-to-weight ratio. Used for dynamic high load sail controls including mainsheets, runners, halyards and spinnaker systems.
Air blocks are easy to clean and service. They have few parts and no loose balls or rollers to misplace. Unlike blocks that are riveted, fasteners allow quick disassembly with a single hex wrench.
Lightweight blocks with high-load Torlon® roller bearings for a high strength-to-weight ratio
Ideal for sail controls including mainsheet, runner, halyard, and spinnaker systems
Center cage keeps Torlon® roller bearings separated and parallel to reduce friction
Sheaves have radiused edges to protect today’s high-tech line
Footblocks with lockoffs temporarily secure sheets
Use to Handle huge loads associated with Genoa and Spinnaker Sheets
Sheave Diameter: 2 1/4" (57 mm)
Max. Line Diameter: 7/16" (12 mm)
Max. Working Load (MWL): 1650 lb. (750 kg)
Breaking Load: 3300 lb. (1500 kg)
Weight: 7.6 oz. (215 g)
Length: 3 5/16" (84 mm)
57mm Black Magic® Footblock, HL Double Footblock
7/16 Inch or 11 mm
No Integral Cleat
3 5/16 Inches
Safe Working Load
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