3PCS Spiral Step Drill Bit Set 4 to 32mm HSS High Speed Steel Cone Hole Cutter Bit for Drilling Plate Aluminum Metal

Feature: 1. Versatile Hole Sizes: Three standard SAE spiral step drill bits can drill 32 different hole sizes in various material thicknesses. The 3 tools come in sizes of 4 to 12mm, 4 to 20mm, and 4 to 32mm, providing a wide range of hole diameters. 2. Steel Construction: Constructed from forged, heat treated high speed steel (HSS) with a Ti nitride coating, these drill bits are robust, wear proof, erosion resistant, and offer a longer lifespan. 3. Easy Installation: Equipped with a 1 4 inch (6.35mm) round shank for easy mounting on power screwdrivers, drill heads, and electric drills, suitable for workpieces with a hardness below 25 degree and a thickness below 5mm. 4. Efficient Cutting Design: The two edge design of the cone hole cutter bit allows for faster and smoother cutting, while the triple flat shank ensures a secure grip during use. 5. Wide Application: Ideal for drilling holes in metal sheets, iron plates, aluminum sheets, brass, wood, plastic, and more, this spiral step drill bit set offers versatility across various materials. Specification: Item Type: Spiral Step Drill Bit Set Material: High Speed Steel Weight: Approx. 228.00g 8.04oz Height: Approx. 101mm 4.0in, 75mm 2.95in, 64mm 2.52in. Package List: 3 x Spiral Step Drill Bit