General description Step Drill Bit is designed for drilling holes of various sizes from 5mm to 35mm in diameter. Its professional design allows for optimum speed and precision, enabling you to work on large size holes without the need to replace the drill bit or locate new holes. This drill bit is suitable for processing materials such as wood, steel, aluminum, and plastics. Technical specifications Diameter range: 5mm to 35mm Material: Titanium coating Type: Triangle conical Usage Ideal for drilling into wood, steel, brass, aluminum, and plastic Can be used with a screwdriver drill Recommended to use with water cooling to extend the service life of the drill bit Other information Dimensions are laser engraved into the metal for durability