The hitachi dv18v rotary impact drill with two speed gearbox and sturdy aluminium gear casing provides longer working life fitted with a 13mm keyless chuck and a soft grip handle supplied with a side handle depth stop and carrying case specification chuck 13mm keyless input power 690 watt no load speed 0 10000 3000min maximum impact rate 0 1300039000min capacity concrete 18mm steel 13mm wood 40mm overall length 333mm weight 20kg