3PCS Step Drill Bit Set, HSS Stainless Steel, 4-12/20/32mm, Titanium Conical Triangle, with Hex Shank, For Screwdriver on Steel, Brass, Wood, Plastic

[Saving time and labor, efficient and fast] The HSS conical drill bit is made of high-speed steel, which reduces heat and friction, cools quickly, and automatically removes debris from the hole during drilling. The spiral design prevents slippage, making drilling easier and more efficient. [Three sizes to meet your needs] 4mm-12mm, 4mm-20mm, 4mm-32mm; you can choose different drill bits according to your requirements. [Wide range of uses] The product can process thin iron sheets, aluminum, insulation boards, PVC panels, wood panels, and other materials up to 3mm thick. [Convenient carrying nylon bag] The product comes with a nylon fabric bag, which provides good storage and protection. No need to worry. of loss and wear caused by the small size of the product. Features: 1. Laser marking makes dimensions clearer; 2. High-speed steel for longer service life; 3. Three-sided shank prevents slippage in the drill chuck; 4. Double cutting blade design allows for faster and easier cutting; 5. X-type opening design for easy removal of cutting debris during drilling; 6. Added cobalt reduces friction and lasts longer than those without cobalt; 7. Sharpness and titanium coating ensure easy cutting through most sheet metal, plastics, and other materials. Specific Information Size 1: Length 7cm, Diameter (mm): 4 to 12: 4, 5, 6, 7, 8, 9, 10, 11, 12. Size 2: Length 7cm, Diameter (mm): 4 to 20: Size 3: Length 10cm, Diameter (mm): 4 to 32: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32