Set of HSS (High-Speed Steel) Step Drill Bits.

Material: The bits are made from high-speed steel, often with a titanium coating to reduce friction, ensure durability, and extend cutting life. Functionality: They are designed to cut clean, accurate holes in various materials, including steel, aluminum, copper, plastic, and wood. Design: The step design allows for drilling various diameters, and features like self-centering split tips mean pre-punching might not be necessary. They also automatically deburr holes while drilling for a smooth finish. Center Punch: The included automatic center punch delivers a spring-loaded strike to mark the starting point for drilling, preventing the drill bit from wandering. Sizes: The specific bits in the image are marked for ranges{phone=141383162}, and 3/16-1/2 inches.