Ronstan 75mm Ratchet Block

The patented extruded hole design, in conjunction with the groove profile of the sheave, provides a more powerful grip than conventional designs - up to 20:1 holding power. Unrivaled low weight is achieved by the use of a Torlon® ratchet pawl, high grade machined alloy sheave and black Acetal hubs and bearings. On-Off switching knob is fitted to both sides of the swivel blocks (one can be removed if desired). Ratchet blocks can be disassembled for sheave replacement with RF62000. Great for: Mainsheet on powerful dinghies and skiffs Series 60 mainsheet systems on sportsboats using RF7 mainsheet swivel units Control line applications on larger yachts Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks)