Bulldog Xtreme Rotary Hammer Drill Bit, SDS-Plus, Carbide, 7/8 x 10-In.Bulldog xtreme, 7 8" x 10", sds plus, carbide, rotary hammer drill bit, carbide percussion bit, 4x life in rebar & 40 percent more life in concrete than competitive full head carbide bits, optimized for heavy duty rotary hammers, less carbide wear than 2 cutter means end user is more productive with each bit, no jamming when hitting rebar, diffusion bonding technology provides stronger carbide bond for a longer lasting bit, 4x longer life in rebar