The UNIBIT 4M 4MM-22MM from Field Tool Supply is a high-performance step drill bit that accommodates a range of sizes from 4mm to 22mm. This bit is engineered for efficiency, allowing users to drill multiple hole sizes with a single tool. Made from premium materials, it ensures durability and precision in various applications, including metal, plastic, and wood. The unique design minimizes walking and enhances control, making it ideal for both professional and DIY projects. Upgrade your drilling capabilities with this versatile UNIBIT.