Set of 3 stepped milling drill bits, made of high-speed steel and stainless steel, 4-12/20/32 mm, conical triangular drill bits in titanium alloy, hexagonal shank, suitable for drilling holes in steel

【High-Quality Materials, Guaranteed Quality】The shank and conical drill bit are made of high-quality high-speed steel (HSS), ensuring high durability. Usage Tips: When using the electric drill, keep it as vertical as possible, avoid vibrations and tilting, and do not set the drilling speed too high. 【Time-Saving, Effort-Saving, High Efficiency】The high-speed steel conical drill bit reduces heat and friction, allows for rapid cooling, 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: 4-12 mm, 4-20 mm, and 4-32 mm. Choose the drill bit that suits your requirements. This product allows drilling through iron and aluminum sheets, insulation panels, metal sheets, PVC panels, wood panels, and other materials up to 3 mm thick.