The MR-3 ID is a drilling unit able to operate on steep surfaces . Its wide-base tubular structure features a skid that allows it to adapt to the roughness of the ground during its movement. The MR-3 ID can be equipped with an hydraulic rotary head (to operate down-the hole hammers up to 4”), or with a roto-percussion hydro-pneumatic drifter. The mast feed system is powered by an internal hydraulic cylinder.