Spiral Grooved Step Drill Bit 4mm To 12mm Step 14in Shank M35 Cobalt 9 Sizes Multi Step Cone Bits

Feature: 1. Faster And Smoother Cutting: The four spiral grooves and cutting blades of this step drill bit ensure quicker and smoother cutting, making it feel like cutting through butter. 2. High Speed: Made from high speed design, this step drill bit is perfect for drilling stainless steel, metal sheets, wood, plastic, aluminum, copper, and other metal plates. 3. High Hardness: With a surface hardness of 89HRC, this step drill bit can cut through harder materials and achieve higher cutting speeds. 4. Material: The step drill bit is made from M35 cobalt steel, which is known for its excellent heat resistance, strength, and durability. 5. Diameters: Designed to drill holes in nine different sizes ranging from 4mm to 12mm, and it features a 14?inch shank for easy compatibility with various drilling machines. Specification: Item Type: Step Drill BitsMaterial: M35 Cobalt .Hole Diameter: 456789101112mm0.20.30.40.5in Shank Diameter: 14 inch Package List: 1 x Step Drill Bit1 x Storage BoxFaster And Smoother Cutting: The four spiral grooves and cutting blades of this step drill bit ensure quicker and smoother cutting, making it feel like cutting through butter. High Speed: Made from high speed design, this step drill bit is perfect for drilling stainless steel, metal sheets, wood, plastic, aluminum, copper, and other metal plates. High Hardness: With a surface hardness of 89HRC, this step drill bit can cut through harder materials and achieve higher cutting speeds. Material: The step drill bit is made from M35 cobalt steel, which is known for its excellent heat resistance, strength, and durability. Diameters: Designed to drill holes in nine different sizes ranging from 4mm to 12mm, and it features a 14?inch shank for easy compatibility with various drilling machines.