Specifications: Diameter [mm]: 5.5 Application: Ceramic, Granite, Concrete, Brick, Wood, Metal Working length [mm]: 90 Total length [mm]: 150 Features: Up to 5 times more accurate than a standard drill bit Precise drilling thanks to Bosch's patented centering geometry. The cylindrical shaft is suitable for the drill chuck with a gear ring. Ideal for drilling holes in a variety of materials. It can be used in hammer drilling mode in concrete and stone, and in turning mode in brick, tile, sheet, wood and plastic. The first choice for the construction industry: maximum precision and versatility. **