HSS Pro metal drill bits are super high-performing and long-lasting. They're meant for drilling stuff like steel, steel castings, alloyed and non-alloyed steel, non-ferrous metals, cast iron, hard plastics, and similar materials. The 118-degree cross-ground tip on the blade gives the steel optimal durability at the start of drilling and speeds up the process. The blade needs less drilling force than regular high-speed steel chisel blades. 118-degree cross grinding Super strong material Optimal drilling power Super precise drilling result Made from quality high-speed steel