Drilling efficiency drastically increased by redesigned hammering mechanism Anti-Vibration Technology (AVT) for low vibration Powerful yet with low vibration due to 2 Counterweights Anti-vibration side grip Anti-vibration rear handle Color: Blue Weight(KG): 6.500 SPECIFICATION Impact Energy: 3.9 J Capacity On Steel: 13MM (1/2") Capacity On Wood: 32MM (1-1/4") Capacity For Core Bit: 80MM (3-1/8") Capacity For Diamond Core Bit: 80MM (3-1/8") Blows Per Minute (BPM): 0-4500 No Load Speed: 0-840 RPM Chuck Capacity: 1.5 - 13MM