Metabo KHE-D24 5.6 Amp 1-Inch SDS Rotary Hammer with Rotostop Torque 106 in-lbs Drilling capacity in - Concrete with hammer drill bits 15/16 " Maximum impact rate 4600 /min Maximum single-blow energy 2.2 J Metabo S-automatic torque limiting clutch Clockwise and anticlockwise rotation