HSS Step Drill Bits Set for Metal with Straight Flute

HSS Step Drill Bits Set for Metal with Straight Flute. Multi-Size Drilling Efficiency: Drills multiple hole sizes with one bit, eliminating the need for center punching or pilot holes. Precision Laser Markings: Diameter markings are permanently laser-etched in the flute area for accurate hole size determination. Deburred Cylindrical Holes: Produces exact, deburred cylindrical bores suitable for even very thin-walled materials. Anti-Slip Flatted Shank: Flatted shank design prevents slippage in three-jaw chucks for secure operation. Customizable Specifications: Custom options for shank (Hex/Round/Triangle), flute (Straight/Spiral), and point angle. Wide Material Compatibility: Effective for drilling steel, brass, aluminum, copper, plastic, and wood up to 3.2mm thick. Direct Manufacturer Source: 15 years of production experience with direct export to USA, Europe, Australia, and more.