Part Number: DCH273N. 1 x 4 Piece Chisel Set. Uncertainty: K1/K2/K3 (Vibration): 1.5m/s². Sound Pressure Uncertainty: 3 dBA. Sound Power Uncertainty: 3 dBA. No Load Speed: 0-1,100/min. It is fitted with an electronic clutch for consistently high torque and improved durability and is ideal for drilling anchors and fixing holes into concrete, brick and masonry from 4 to 24mm.