DEWALT ELITE SDS+ Full Head Carbide 4 Cutter Drill Bits are ideal for drilling holes into reinforced concrete. Designed to resist breakage when striking rebar. The tapered core increases strength and resists flute breaks. DEWALT ELITE SERIES™ Drill Bits are ideal for drilling holes in concrete, and the high speed blasting strengthens the bit to reduce the risk of breakage. The 4 cutter carbide head provides maximum performance. Dewalt Elite Sds Full Head Carbide 4 Cutter Drill Bit