57mm Carbo Ratchet Block-1.5X and 2X-2 Pack - #2172Power3 ratchet blocks provide sailors that race small one designs with three holding power options to handle a variety of wind and sea conditions. More choices allow sailors to fine tune their set ups in tandem with the purchase that provides the ideal level of power, responsiveness and grip. On off switch operates from both sides. 1. 5x grip: breezeon puffs; 15: 1 holding power. 2x grip: big breeze steady: 20: 1 holding power.