8.5a, 1/2 “, 2 speed, hammer drill, for high torque & high speed drilling capabilities, auxiliary handle with built-in depth gauge securely locks into place & provides consistent drilling depth, integral slip clutch allows more user security by disengaging the output shaft if the bit gets into a bind situation, securely clamping 1/2” three jaw chuck for rugged hammer drilling applications, dual mode selector converts from rotation only to hammer drill mode.