Four Spiral Flute Step Drill Bit, 1/8 - 1/2(13 Sizes) 1/4 Hex Shank Cobalt Step Drill Bit Fully Coated with TiAlN for Metal, Stainless Steel, Aluminum, Plastic

¡¾13 Sizes in 1 and Hex Shank¡¿: Our 1-piece cobalt step drill bit comes with 13 sizes to meet most drilling needs. Sizes includes 13 sizes: 1/8,3/32, 3/16, 7/32, 1/4, 9/32, 5/16, 11/32, 3/8, 13/32, 7/16,15/32, and 1/2. The hexagonal shank enhances clamping stability, is easy to replace, and is compatible with most chucks on the market.