Crosby Speedbinders Drive Bolt Replacement 14mm, 9/16Crosby Speedbinders Drive Bolt Replacement 14mm, 9 16 are designed as a 'wear item' to replace your worn gear set. Lasts between 2000 3000 cycles. Using a 1 4 or 3 8 impact will shorten the lifespan to around half of that. Using a 1 2 impact will void the binder warranty so please treat your Speedbinders with love! Replacement drive bolt suits any torque drive. The 14mm six sided socket is preferred over the 9. 16. The 14mm is a much higher fit.