ZEXON Step Drill Bit for Stainless Steel ZSD-521S - Cobalt High-Speed Steel 5-21mm

The ZEXON Step Drill Bit ZSD-521S is engineered for durability and precision when drilling through stainless steel, aluminum, and thin iron plates. - Made from high-durability Cobalt High-Speed Steel (M35) - Suitable for multiple hole sizes: 5, 7, 11, 13, 15, 17, 19, 21mm - Cobalt coating for high heat and friction resistance - Chip breaker function to prevent debris clogging - 6.35mm hex shank for secure grip Shipped directly from Japan. Authentic Japanese product.