Lead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers. When mounted in an inverted position, are frequently used as upright leads...

This upright lead block with a 20mm sheave from Ronstan is typically used for halyards at the mast base. Lead blocks are a low-profile solution for leading halyards or other rig sail controls back to...

This upright lead block from Ronstan is typically used for halyards at the mast base. Lead blocks are a low-profile solution for leading halyards or other rig sail controls back to cleats or jammers...

Ronstan Series 75 Roller Bearing Block, Upright Lead, Single Single, upright lead The self-contained alloy sheave packages provide reliable, low-friction performance at high loads. The high axial...

Ronstan Series 75 Upright Lead, Single Features   High static and dynamic load capacity. Keeps lines close to the deck. Cheek cut-outs for easy bearing cleaning and maintenance...

Ronstan Series 60 Upright Lead, Single Upright All Purpose Lead Ball Bearing models have Torlon® needle rollers for axial loads, and acetal ball bearings for side thrust loads. Blocks can be...

Ronstan Upright Lead Block, Wide 19mm Sheave Suitable for rope up to 8mm. The external tabs can be formed to fit the spar profile before fastening Lead blocks are a low profile solution for...

Ronstan Upright Lead Block, 22mm Nylatron Sheave Suitable for use with wire or rope The external tabs can be formed to fit the spar profile before fastening Lead blocks are a low profile solution...

Ronstan Upright Lead Block, 29mm Acetal Sheave Single upright, removable sheave   Typically used in dinghy spars for control lines   U.V. stabilised Acetal sheave. Grade 316 stainless...