The metabo uhe 2850 3 mode sds plus hammer drill is a special multi sds hammer with a four function gearbox sds hammer rotary only gear 1 low speed high torque gear 2 high speed low torque and chisel function this machine is a true multi tasking work horse it is also capable of forward and reverse action with carbon brush change over its primary function is for drilling holes in concrete from 5 to 20mm in diameter but it can cope comfortably with holes up to 28mm in diameter features include a h