[12 Step Sizes]12 sizes available: 3/16", 1/4", 5/16", 3/8", 1/2", 9/16", 5/8", 11/16", 13/16", and 7/8", catering to diverse drilling needs. [4 Spiral Flutes]The four-flute design ensures faster, smoother cutting-effortless like slicing through butter. [M35 Cobalt High-Speed Steel]Ideal for drilling stainless steel, hardened metals, low-carbon steel, galvanized steel, aluminum, copper, plastic, wood, and materials with similar or lower hardness. Capable of handling stainless steel up to 1/8" (3mm) thick. [TiAlN Coating]Featuring a hardness of 89HRC, it enables cutting harder materials and supports higher cutting speeds. [Continuous Operation]Polished steps and clearly visible size markings allow you to see the target hole size during drilling, eliminating the need to stop and check, saving time and effort. Color: As Shown Material: Metal Package Contents: 1*Cobalt Drill Bit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.