The MayhewPro 37315 Shake n' Break Pneumatic Bolt Breaker, 3/8-Inch attaches to air hammer to provide vibration while removing stubborn/frozen fasteners or torx bolts/nuts. Other end of each Shake 'n Break has either a 1/2-Inch or 3/8-Inch square drive to be used with impact sockets. Built-in hex (19mm-3/4-Inch) on shaft of tool to be used in conjunction with open-end wrench when loosening stubborn fastener. Applications include bearing removal and GM caliper removal. Made in the USA. Over all length: 5-Inch, body size: 0. 401-Inch, body type: Round, and weight: 0. 32-pound. Comes with an unlimited lifetime . Mayhew stands for quality, dependability, and confidence. When the caliber of the tools is just as important as the skills of the professionals employed, businesses trust Mayhew to get the job done. Since 1856, our punches, chisels, and pry bars have been the go-to tools for OEMs and professional mechanics throughout the country. And while our company has grown to meet the needs of the professional market, as well as those of the do-it-yourself automotive enthusiast, our focus has never changed - leveraging our strength to build your business.