The MR-5 PN is a drilling unit able to operate on steep surfaces. Its tubular structure with a wide base with 4 wheels, allows the unit to adjust itself to the uneven ground while moving; the possibility to rotate the supports of 90°allows an easy lateral translation. The MR-5 PN can be equipped with a pneumatic rotary head (to operate down-the hole hammers up to 4”), or with a roto-percussion pneumatic drifter. The mast feed system is powered by a pneumatic piston motor.