General description FLITI Large Set 6-60mm HSS Step Cone Drill Bits includes 12 sizes ranging from 6mm to 60mm. Made from high-speed steel with a titanium coating, these drill bits are designed for durability and efficiency, making them ideal for various materials including steel sheets, aluminum, copper, plastic, and wood. The dual cutting blades and advanced spiral groove design enhance cutting speed and smoothness, while the slotted tip and laser-etched measurements improve visibility and usability. Technical specifications Material: High-speed steel with titanium coating Drill sizes graduated: 12 steps (6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm) Usage Perfect for home repairs and light jobs Suitable for drilling holes in plastic, aluminum, copper, and various types of sheet metal Automatically deburrs holes while drilling to keep the bit clean