Ratchet Blocks Complete With Bolt Ratchet Block complete with bolt. The ratchet block is used on a recovery spectacle lift to connect the ratchet to the spectacle frame. This allows the strap to be ratcheted over the wheel for securing the car onto the spectacle lift. Dimensions: 60mm width x 70mm length x 6/15mm depth c/w Nut & Bolt For use with 50mm short handle ratchet