High Hardness Spiral Groove Step Drill Bit Set, Industrial Grade Step Drill Bit Set, Durable Heavy Duty Spiral Groove Drill Bit Set, Suitable for Stainless Steel, Aluminum and Plastic
R 4,593
or 4 x payments of R1,148.25 with
Availability: Currently in Stock
Delivery: 10-20 working days
High Hardness Spiral Groove Step Drill Bit Set, Industrial Grade Step Drill Bit Set, Durable Heavy Duty Spiral Groove Drill Bit Set, Suitable for Stainless Steel, Aluminum and Plastic
Slash your tool inventory with 3 split drill bits that replace 29 standard bits. Each 1mm incremental step (4–32mm range) handles precise hole sizing without swapping tools, ideal for steel beams, pipes, and sheet metal.
Tungsten-carbide coating maintains razor sharpness through 5x more cycles than standard bits. The spiral design distributes heat evenly, preventing warping even at 1,500 RPM in stainless steel.
Optimized helical grooves reduce cutting resistance by 40% vs. 2-flute designs. Continuous spiral channels eject debris instantly, eliminating clogging during deep drilling in copper or aluminum.
30% thicker hexagonal shanks resist torsional stress during high-torque drilling. Compatible with bench drills (3/8"–1/2" chucks) and impact wrenches up to 650 lb-in torque.
Laser-hardened cutting edges chew through hardened steel (HRC 45+), cast iron, and aerospace-grade aluminum without chipping. Includes diameter markings for quick size verification mid-task.