Outstanding lifespan in metal! High-speed steel, ground for long-lasting performance. Do you need durable drill bits to enable easy drilling without center holes? Then the PRO Metal HSS-G spiral drill bit is the right choice. With it, you can drill effectively and place holes exactly where they should be. PRO Metal HSS-G drill bits are a great choice for construction workers and installers who need durable metal drill bits for drilling in alloyed and unalloyed steel, non-ferrous metals, cast iron, plastics, and wood. They are made from high-quality high-speed steel and are ground for strength, heat resistance, and precision. The cross-ground drill tip allows for precise starting.