General description These 3pcs Metal Step Drill Bits are designed for versatility and efficiency, featuring three different sizes: 4-12mm, 4-20mm, and 4-32mm. The set comes with a nylon bag for convenient storage and transport. Technical specifications Sizes: 4-12mm, 4-20mm, 4-32mm Shank type: 1/4 inch (6.35 mm) hex shank Material: HSS steel with titanium coating Usage Suitable for drilling holes in various materials including wood, sheet metal, steel, aluminum, brass, copper, and plastic. Ideal for applications such as sheet metal work, sink installation, and car repairs. Can drill through materials up to 5 mm thick. Other information