The CP714 is a super duty air hammer for professionals who want the best. Choose the CP714 for a wide range of applications including front end, exhaust, riveting, king pin bushing removal and bolt shearing. This is the most controllable CP Hammer available has a extra sensitive tease throttle because of its spool valve which controls starts and stops. Shank size; .401-inch; bore: 9/16-inch; stroke: 3.13-inch; 2000 blows per minute; average air consumption: 2.13 cfm; air inlet thread: 1/4-inch NPTF; minimum hose size: 3/8-inch; sound dBA: 91. Hammer weighs just 3.33 lbs.