5 × drill bitApplicable to: Ceramic Tile, Glass, Concrete, Brick Wall, , Wood, PlasticThe unique triangular handle shape enables the bit to be tightened without slipping.High hardness, more durable, longer service life.No broken edges no small incision resistance fast opening speed easy chip removal etc. easy decoration after opening.A Set Drill Bit(Contain:2x 6mm (1/4" ) ,1x 8mm (5/16"),1x 10mm(3/8"),1x 12mm(1/2"))The drill bit has been grooved, the surface of the drill body is clean and without burrs. The paint is -proof and the chip removal is smoother.The bit is made of cemented carbide, and its hardness is higher than that of ordinary bit. The cutting resistance is small and the drilling efficiency is high.