General description Our HSS Step Drill Bit is crafted from high-speed steel, ensuring fast, comfortable, and frictionless drilling. This professional titanium cone drill bit comes with a small case for easy storage and portability. The titanium coating enhances its durability, providing excellent resistance to corrosion, heat, and rust, which extends its service life even under extreme temperatures. Technical specifications Material: High-speed steel Step diameter sizes: 5 mm, 7 mm, 10 mm, 12 mm, 15 mm, 17 mm, 20 mm, 22 mm, 25 mm, 27 mm, 30 mm, 32 mm, 35 mm Usage The step drill bit is ideal for household repairs and light work, allowing you to drill holes in various materials such as plastic, copper, aluminum, and many types of sheet metal. However, it is not suitable for stainless steel. To enhance the drill's longevity, it is recommended to pour water on the drill bit while working to cool it down.