Bulldog xtreme, 1/2″ x 4″ x 6″, 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, 1/2″ diameter, 4″ flute length, 6″ overall length, 4″ useable length.