CMD562482 Carbide Tipped 450 mm SDS Drill Bit, 20mm Diameter. This SDS+ drill features carbide cutting edges for sharp and accurate cutting into masonry. A centre tip for a precise drilling start and good guidance while drilling. The blackened finish adds heat treatment to reduce friction between the drill bit and workpiece. Spiralling flutes allows for smooth and efficient drilling. For use with drills with SDS+ fitting shank for a safe and secure fit.