Capacity : Concrete: 20 mm (13/16″) Steel: 13 mm (1/2″) Wood: 26 mm (1″) Blows Per Minute (BPM) : 0 – 4, 000 No Load Speed (RPM) : 0 – 1, 100 Vibration Level : Hammer Drilling into Concrete: 14.5 m/s² Sound Pressure Level : 87 dB(A) Sound Power Level : 98 dB(A) Dimensions (L x W x H) : 358x84x259 mm (14-1/8″x3-5/16″x10-1/4″) Net weight : 3.2 – 4 kg (7.1 – 8.8 lbs.)