The IRWIN Speedbor Unibit 3-piece step drill set covers a range of 1/8" to 3/4", making it ideal for drilling holes and slots in sheet metal, plastic, wood, and other materials. The set includes a step drill, a 1/8" bit, and a 3/4" bit — giving you the versatility to tackle a wide variety of drilling tasks with a single kit.
Constructed from high speed steel for durability and long-lasting performance, these step drills are engineered to cut through tough materials quickly and efficiently. The step drill design allows a single bit to create multiple hole sizes, reducing the need for multiple tool changes and improving job-site productivity.