Ronstan Series 60 Ultimate Ratchet - Single [RF62100]Series 60 Ultimate Ratchet Single The 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