Precision made step drill manufactured from quality high-speed steel, heat-treated for increased hardness. Ideal for drilling non-ferrous metals, sheet metal, and PVC. The US PRO 5-35mm HSS-G+ Step Drill is designed for precision drilling in various materials, offering versatility and durability. Size Range: 5, 7, 10, 12, 15, 17, 20, 22, 25, 27, 30, 32 and 35mm. Shank Diameter: 13mm. Shank Length: 24mm. Precision Made: Ensures accurate and clean holes. Material: High-quality speed steel for durability. Heat Treated: Increased hardness for extended tool life. Application: Suitable for drilling non-ferrous metals, sheet metal, and PVC. Usage: Can drill a range of hole sizes with a single bit; ideal for thin materials like sheet metal.