THREE SIZES: 4mm-12mm, 4mm-20mm, 4mm-32mm. You can choose different drill bits according to your needs. TIME SAVING: The HSS cone drill bit is made of high-speed steel, which can reduce heat and friction, cool quickly, and automatically remove debris in the hole when drilling. The spiral design can prevent slippage, making drilling easier and more efficient. WIDE APPLICATION: The drill bit can process thin iron plates, aluminum, insulation boards, PVC boards, wood boards and other materials with a thickness of no more than 3mm.
