Outstanding lifespan in metal! High-speed steel, ground for long-lasting performance. Many drill bits wear out too quickly, making it difficult to start holes exactly where you need them. We have the solution: PRO Metal HSS-G spiral drill bits with double cutting edges. They are durable and precise, featuring tips and spirals at both ends to double their lifespan. PRO Metal HSS-G drill bits are an excellent choice for construction workers and installers who need long-lasting bits for drilling into alloyed and non-alloyed steel, non-ferrous metals, cast iron, plastics, and wood. They are made from high-quality high-speed steel and ground for durability and precision. We have equipped them with a centering tip to allow you to drill holes accurately. The bits are short, which is helpful when you need to drill in tight spaces.