YOKOCUT 3-13MM HSS Cobalt Step Drill Bit - Hex Shank, Double Spiral

The YOKOCUT 3-13MM step drill bit combines HSS M35 steel with a cobalt-added coating for longer life and smoother cuts. Its double-spiral flute design removes chips quickly, reducing heat and giving a clean hole in metal, copper, aluminum, wood, PVC and insulation boards. The quick-change hex shank fits most power drills, letting you swap bits fast without losing torque. With stepped diameters from 3 mm up to 13 mm, you can drill multiple hole sizes with a single bit, saving time and inventory. Ideal for DIY projects, the bit handles thin metal sheets and soft materials while avoiding damage to hard, brittle surfaces like stainless steel, glass or tile. Backed by a 60-day money-back guarantee and a 24-month warranty, YOKOCUT ensures confidence in every purchase. Whether you are building a prototype, installing fixtures, or tackling home repairs, this versatile step bit delivers precise, repeatable results with minimal effort.