1.32029 Air Hammer Socket Adapter, 37315 3/8" & 37316 1/2" Shake 'n break Pneumatic Bolt Breaker Set,2-Piece. | 2.Standard .401 Turn Type Parker Shanks for air guns. | 3.The end of each bolt breaker has either a 1/2 or 3/8-inch square drive to be used with impact sockets. The built-in hex (19mm - 3/4-inch) on the shaft of the tool is used in conjunction with an open-end wrench when loosening a stubborn fastener. Applications include bearing removal and GM caliper removal. | 4.air hammer to provide vibration while removing stubborn/frozen fasteners or torx bolts/nuts, other end of each bolt breaker has either a 1/2-inch or 3/8-inch square drive to be used with impact sockets. | 5.If there have any question or problem with your order, please feel free to contact us. We will reply to you within 24 hours and make it right for you.