KSC SPEED 523 DRILL The most reliable water flushed rock Drill used in underground mines and tunnels for horizontal or inclined drilling in conjunction with a Pusher Leg. It is capable of drilling 27-40 mm diameter holes with H22 Integral steels upto a dept of 6M. KSC SPEED 523 DRILLis one of the most reliable Rock Drill available for underground application.