Bulldog xtreme, 5/8" x 18", sds-plus, carbide, rotary hammer drill bit, carbide percussion bit, 4x life in rebar & 40% 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, 16" flute length, 18" overall length, 16" useable length.