The GSB 1600 RE Professional drill with a 750 vat power is very compact and powerful. It gives the possible to a quick-change metal chuck.It has the forward/reverse rotation and electronic control for exact pilot drilling.Also it has speed preselection with setting wheel and softgrip for a secure hold.The drilling diameter in concrete is 16 mm, in masonry 18 mm, in wood 30 mm and in steel12 mm