3PCS Countersink Drill Bit, HSS Stainless Steel Metal, 4-12/20/32mm, Triangle Conical Titanium, with Hexagon Shank, for Screwdriver Drilling on Steel, Brass, Wood, Plastic

General Description High quality stainless steel HSS cone drill bits are designed for optimal durability. This 3-piece set includes drill bits in sizes 4-12mm, 4-20mm and 4-32mm, suitable for various materials such as steel, brass, wood and plastic. Their spiral design helps prevent slipping, making drilling easier and more efficient. A nylon fabric bag is included for convenient storage and protection against wear and tear. Technical specifications Material: HSS stainless steel Drill sizes: 4-12 mm, 4-20 mm, 4-32 mm Maximum thickness of materials to be drilled: 3 mm Use For optimal use, it is recommended to keep the drill as vertical as possible, avoid shaking and not rotate the drill at excessive speed. The HSS taper drill bit reduces heat and friction, allowing rapid cooling and efficient removal of debris when drilling.