DEWALT | SDS Max Combination Hammer With Utc 48mm 9.1kg 220V | D25733K-B5Features Ideal for drilling anchor fixing and through holes in concrete and masonry from 12 to 48 mm in diameter. Core drilling up to 125 mm Active vibration control system incorporating a counterbalance mass and floating handle delivers extremely low vibration An anti rotation system detects a loss of tool control; and reacts by instantly cutting the power 2 stage clutch system that allows the user to change the clutch level from low to high torque;