High-quality materialThe step drill bit is made of high-hardness high-speed steel, which makes the metal drill bit perfect for metals. It offers excellent wear resistance and chip resistance, ensuring a long service life. The countersink drill bit and countersink drill bit are also designed for optimal performance in various applications. Step Drill Bit SizesThe cone drill bit has a size range of 10 to 45 mm (8 steps: 10, 15, 20, 25, 30, 35, 40, 45 mm). You can use the step drill bit at any time to drill holes of suitable sizes between 10 and 45 mm. Multi-functionOur step drill bit can be used to drill metal, stainless steel, aluminum, copper, plastic and plexiglass. It is perfect for tasks such as cable management, car bodywork, rainwater tanks, and wood paneling. The step drill bit, along with the countersink and countersink drill bit, are also ideal for working with wood and plastics. No Bit Change RequiredWith our 8-step step drill bit, you can drill holes from 10 to 45 mm without having to change bits, eliminating the need for additional pre-drilling. The step drill bit is an essential tool for any DIYer or professional.