CHP1664 Features: * Built-in power regulator * Cuts, chips and scrapes most materials * Increased comfort for long applications * 1/4 in. NPT air inlet protects air hammer from debris damage * 2 - 5/8"" (67 mm) stroke Specifications: * 3,500 blows per minute * 11.0 avg. SCFM requirement at 90 PSI Dimensions: * Weight: 4.40 lbs. * Dimensions: 2.1"" H x 7"" W x 8.8"" D Warranty: * Warranty: 3 year limited