Bulldog xtreme, 5/8" x 4" x 6", 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 versus standard sds plus bit, wear mark assures accuracy of hole diameter, centric conical tip guides bit through concrete & provides rounder holes, 5/8" diameter, 4" flute length, 6" overall length, 4" useable length.