ITEM NAME:5Pcs Titanium Step Drill Bit Set With Automatic Center Punch, 50 Sizes In 5 E2C4 5Pcs Titanium Step Drill Bit Set With Automatic Center Punch, 50 Sizes In 5 E2C4 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. 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. Color: gold + black Material: Steel 1. Drills holes of various sizes without changing bits. 2. Minimal shocks and almost impossible to snap compared to conventional bits. 3. Smooth hole edges, perfect to drill holes for HVAC jobs. 4. Smoother and rounder holes. 5. Prevents metal scurf from flying around for improved safety. Convenient&Accurate Laser-engraved reference marks on each bit offer superb convenience and accuracy, perfect for drilling large and small-diameter holes in metal and plastic. For high-efficient drilling, thickness of sheet metal shall be less than that of each step Universal Compatibility Compatible with 1/4, 3/8, 1/2 electric drills or bench drills, but only work for sheet metal, aluminum or plastic. Sleek & Accurate Drilling X-type openings design to facilitate the removal of cutting waste when drilling, preventing iron chips or sawdust from scattering and ensuring sleek & accurate drilling. Package Contents: 5* drill bits 1* handle
