Quality Heat treated and polished for durability and sharpness. These drill bits cut efficiently and run cooler, helping extend their lifespan. Performance Step drill bit designed for deburring, chamfering, cutting, and expanding holes. Works across a variety of materials including steel, wood, plastic, and more. Broad Compatibility Improves clamping stability and is compatible with pistol drills, hand drills, charging drills, and bench drills, reducing slippage and wear during rotation. Convenience and Versatility Drills holes of multiple diameters in metal and other sheet materials with less effort. Suitable for steel sheets, aluminum sheets, copper, plastic, wood boards, and many other sheet metal types. Practical applications Enlarge and deburr holes in steel or aluminum enclosures for electrical panels or chassis. Drill clean, chamfered holes in wood or plywood for hardware installation and fasteners. Create and size holes in plastic housings or sheet metal to accommodate cables, grommets, or connectors.