General description Step Cone Drill Bit with 13 steps ranging from 5mm to 35mm, designed for precision drilling in various materials including steel, brass, plastic, wood, copper, fiberglass, PVC, thin metal, and aluminum. The drill bit features a classic HSS construction for stability and speed, along with a special titanium coating that reduces friction and heat, enhancing durability and accuracy during drilling. Technical specifications Type: 5-35mm (5, 7, 10, 12, 15, 17, 20, 22, 25, 27, 30, 32, 35mm) Total length: 72mm Height of each step: 3mm Shank diameter: 12.7mm Shank length: 24mm Material: HSS-4241 Weight: 30g Usage Recommended drilling speed is between 250 to 400 rpm. It is suitable for use on materials with a hardness below HRC 25. For optimal performance, it is advised to cool the drill bit with water when working on plates thinner than 5mm to extend its service life. Other information Attention: Always protect your hands when using this tool. This product is not intended