Outstanding lifespan in wood! Tapered spiral groove for drilling through hard materials without jamming. When drilling through multi-layered building materials, you need durable drill bits that won’t block or stop when you hit a nail. With these drill bits, you can penetrate formwork and layers of metal sandwich panels. PRO Wood HSS installation drill bits are perfect for this task. They are a great choice for construction workers and installers who need to drill holes in various building materials like metal sandwich panels and hardwood. They are made from high-speed steel (HSS) to ensure strength and heat resistance. The drill bits are long enough to penetrate multiple layers of building material. They feature a tapered groove that prevents jamming even in wet wood. You can use them for all formwork, interior construction, plumbing, and electrical installation work.