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Choose blocks and attachments rated for your loads to build efficient, low-friction systems. Learn how sheave size, bearings, and lashing or shackle attachment affect performance.
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Harken blocks are precision-engineered sailboat pulleys that redirect control lines over low-friction sheaves, reducing the effort needed to trim sheets, halyards, and running rigging. The lineup spans sheave diameters from...
The Harken Carbo 29mm Double Fixed Head block (381) is a lightweight, 34g twin-sheave block rated for control lines up to 8mm (5/16") and a 299 kg (660 lb) working...
Harken ratchet vs. Ratchamatic blocks explained: how each engages, holding power, and when to choose a switchable ratchet or an auto Ratchamatic.
The Lewmar 60mm HTX Single Block Upstand is a high-performance, upstand-mounted deck block built for smooth, low-friction routing of 10–14mm control lines on cruising and performance sailboats. Its 60mm HTX...
The Ronstan Series 100 Lashing Orbit Block (RF109109A) is a single-sheave, 360-degree swiveling block rated for lines up to 12mm (1/2 in) with a stainless steel lashing bail, built for...