Features a split point that starts on contact with no walking or skating, eliminating the need for a center punch. Bosch black oxide bits offer durability, speed and selection to support most general purpose applications. Speed helix design for faster drilling. Easier drilling and reduced heat for extended drill bit life. For use in steel, copper, aluminum,brass, oak, maple, MDG, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials.