CO-Z Cobalt Added M35 Step Drill Bit, Spiral Step Drill Bit, Unibit Drill Bit for Cutting Drilling Holes On Stainelss Steel, Steel, Metal Sheet, Multiple Hole Stepped Up Bit for Professionals

Our step drill bit set provides faster and more convenient drilling than single flute bits. Double cutting blades and X-type openings design ensure a faster and smoother cutting; 3-sided shank design prevents slip in drill chuck. High-speed steel construction for long service life; the sharpness and titanium coating ensure easily cut through most sheet metal, plastic and some other materials with ease. Cobalt ingredient in the bit helps to reduce friction, which ensures extended service life for many years to go. The easy-to-read step markings and targets save time when drilling holes, perfect for HVAC work, home repairs and light jobs.