DeWalt Brad Point Drillbit 18 x 200mm Dewdt4518qz. The DeWalt brad point drill bits are manufactured from chrome vanadium alloyed steel. They have a centre location point and outer cutting spurs for clean accurate holes. The drill bit diameters of 11mm and above, the shank is reduced to 9. 5mm. Applications: Suitable for drilling hardboard, plywood, chipboard and all natural hard and softwood. Typically used for dowelling applications or wood screw clearance holes. The DeWalt Dewdt4518qz Brad Point drillbit has the following dimensions: Size: 18 x 200mm. Dewdt4518qz Material: Other Material.