The Mastercool Air Powered Brake Caliper Wind Back Tool Kit, No. 43050, offers right- or left-hand wind back operation for rear brake caliper pistons. This kit features a durable, non-impact single piston shaft, O-ring protected shaft to maintain proper pressure, center shaft constructed of chrome alloy steel and a protective rubber guard to prevent damage to the shaft and caliper. This kit includes a 15-pc press adapter set and 3/8” drive adapter surface.