Hoteche HSS Step Drill Bit made from durable M2 high-speed steel (HSS), designed for drilling and enlarging holes in metal, wood, and PVC. Featuring multiple step sizes ranging from 4mm to 39mm, this versatile bit allows several hole diameters to be drilled with a single tool. Ideal for electrical, plumbing, HVAC, sheet metal, and fabrication work, providing smooth, precise cuts and clean hole enlargement.