High Hardness Spiral Flute Step Drill Bit Set

FEATURES

MODULAR MASTERY: 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.

INDUSTRIAL-GRADE EDGE RETENTION: 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.

SMARTER CHIP EVACUATION: 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.

SHANK THAT OUTLASTS WORKLOADS: 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.

UNIVERSAL METAL DOMINATION: 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.

SPEC

Material: Alloy

Flute Types: 4-flute (14–32mm), 2-flute (4–14mm)

Compatible with: Bench Drills, Electric Wrenches, Hand Drills

Scope of Application: Stainless Steel, Iron, Steel, Copper, Aluminum

Package Includes: 1* High Hardness Spiral Flute Step Drill Bit Set

NOTES

Before using the drill, set it to low speed. Lower speed for larger diameters (≤800 RPM).

Use continuous cooling during operation. Check method if each step exceeds 20 seconds.

Please allow a small error due to manual measurement. Please make sure you do not mind before purchasing.

Store in anti-corrosion case when not in use.