The DEWALT Rotary/Percussion Masonry Drill Bits have 130° Douglas Form carbide tips. They are ideal for drilling anchor plastic fixing or pipework clearance holes. Suitable for drilling masonry brick/blockwork and stone.The DEWALT Masonry Drill Bit has the following specification: Diameter: 5mm.Overall Length: 85mm.Working Length: 44mm.PTDDEWDT6505QZ