Patented Vibration Isolation System (both grips). Single motion bit insertion and positionable chisel lock. 1-1/2 in. bit capacity, 6 in. thin wall core bit capacity. Dial speed control: 190-385 rpm, 1700-3400 bpm. Powerful 11.0 amp motor with Electronic Feedback Control Circuit. Includes 12 in. Bull Point Chisel, Flat Chisel, two 4-cutter carbide drill bits (5/8 in. and 3/4 in.), and LHS Shank (Spline Drive).