General description Perfect for precise drilling, the HSS Step Drill Bit features a double slot countersink design that allows for drilling holes from 5mm to 35mm in diameter. This versatile drill bit can handle various materials including steel, wood, plastic, brass, aluminum, and PVC. Technical specifications Size range: 5mm to 35mm Shank type: Round Shank diameter: 13mm Material: High-speed steel (HSS) with titanium alloy coating Usage Ideal for drilling into thin materials such as copper, aluminum, iron plates, wood panels, and plastic plates. The double-flute design enhances drilling speed and precision. Other information Dimensions are laser-engraved for durability and clarity, ensuring they remain visible even after extensive use.