Mayhew’s Pneumatic Bolt Breakers offer you high power reliability for applications including bearing removal and GM caliper removal. Attaching to the air hammer to provide vibration while removing stubborn/frozen fasteners or Torx® bolts/nuts, the other end has either a 1/2" or 3/8" square drive to be used with impact sockets. The built-in hex (19mm-3/4") on the shaft can be used in conjunction with an open-end wrench when loosening stubborn fasteners.