S-B Power Tool HCFC2084 Hammer Drill Bit 1/2"x12"Highlights : Dimensions: 1 2"x12" Full head carbide tip lasts longer for faster drilling speed and less carbide wear; the centric conical tip guides bit through concrete, provides rounder holes Wear mark alerts the user when bit has worn to a level inappropriate for precision anchoring Diffusion bonding technology provides stronger carbide bond for the longest lasting bit 4X life in all concrete types and concrete with rebar Wear mark assures hole