Meichoon Drill 4-22mm M35 HSS-Co Step Bit Spiral Groove Hex Shank Multi-Functional Drilling Tool HSS Cobalt Counterbore Hole Cutter Cutting Enlarge Metal Sheet PCV Sheet Woodworking DC1603

Meichoon M35 Cobalt Step Drill Bit is made of high speed steel together with cobalt, which lasts the bit a long using life. Features: 1. M35 High speed steel for longer service life; 2. Hex shank prevents slip in drill chuck; 3. Double cutting blades design enables a faster and smoother cutting; 4. The advanced double spiral flute design outperforms straight flute design and extends the life of the bit. The split point tip increases speed, and they also include laser-engraved measurements to increase step visibility. 5. The sharpness ensure easily cut through most sheet metal, plastic and some other materials with ease, especially for stainless steel plate & quenching steel plate. Specifications: Material: M35 HSS Sizes of the Step Drill Bits:  4mm, 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm Package included: 1 x M35 HSS Drill Bit