General description HSS4241 High Speed Steel Step Drill Bit is designed for precision drilling with a size range of 6mm to 60mm (0.24 - 2.36 inches) and features 12 step sizes for versatile applications. Built to last, this drill bit is made of high-speed steel and includes a nitrogen-filled design for enhanced durability. Technical specifications Drill bit size range: 6-60mm (0.24 - 2.36 inches) Step sizes: 12 increments (6, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60 mm) Shank diameter: 13mm (0.51 inch) Drill head length: 82mm Compatibility and accessories Suitable for workpieces with a hardness of less than 25 Compatible materials: carbon steel, sheet metal, insulation board, PVC board, planks, and wood less than 5 mm thick Usage The spiral flute design aids in chip removal during drilling, ensuring a cleaner and more efficient drilling process.