The MR-2 PN is a pneumatic drilling unit able to operate on steep surfaces. Its tubular structure with a wide base with 3 special rotating supports, 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-2 PN can be equipped with a pneumatic rotary head (for using 2” / 3” and 4” down-the hole hammer), or with a roto-percussion pneumatic drifter. The mast feed system is powered by a pneumatic piston motor.