BOSCH SDS-MAX ROTARY HAMMER BIT HC5030 3/4"" DIAMETER 13"" LONG FEATURES CENTRIC TIP GUIDES BIT THROUGH HARD AND REINFORCED CONCRETE ANGLED DUST CHANNELS REDUCE HEAT BUILD-UP RESULTING IN LONGER LIFE INCLINED SIDE CUTTERS HAVE AN AGGRESSIVE EDGE FOR FASTER CUTTING WEAR MARK IDENTIFIES WHEN BIT HAS WORN TO AN INAPPROPRIATE LEVEL FOR PRECISION ANCHOR