Limited-time offer ⏳ Spiral groove step drill set (5 pieces) in high hardness

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• 🔥98.9% of customers buy 2 or more

FEATURES

MODULAR CHAMPIONSHIP: Reduce your tool inventory with 3 split drill bits that replace 29 standard drill bits. Each 1 mm increment (range 4–32 mm) allows for precise hole size without changing tools—ideal for steel beams, pipes, and sheet metal.

Industrial edge retention: The tungsten carbide coating provides 5 times more cutting cycles than standard bits and maintains razor sharpness. The spiral design distributes heat evenly and prevents warping, even at 1,500 rpm in stainless steel.

SMARTER CHIP DISPOSAL: Optimized spiral flutes reduce cutting resistance by 40% compared to double-edged designs. Continuous spiral channels immediately evacuate drill chips, preventing clogging when drilling deep holes in copper or aluminum.

SHAFTS THAT WITHSTAND WORK STRESS: 30% thicker hex shanks resist torsional loads during high-torque drilling. Compatible with bench drills (3/8"–1/2" drill chucks) and impact drivers with up to 650 lb-in torque.

UNIVERSAL METAL MASTERY: Laser-hardened cutting edges cut through hardened steel (HRC 45+), cast iron, and aerospace-grade aluminum without chipping. Diameter markings allow for quick size verification while working.

SPECIFICATION

Material: alloy

Groove types: 4-edged (14–32 mm), 2-edged (4–14 mm)

Compatible with: bench drills, electric screwdrivers, hand drills

Application area: stainless steel, iron, steel, copper, aluminum

Scope of delivery: 1 x spiral groove step drill set with high hardness

NOTES

Set the drill to a low speed before use. A lower speed is recommended for larger diameters (≤ 800 rpm).

Continuously cool the drill during operation. Review the method if each step takes longer than 20 seconds.

Since the measurement is manual, there may be slight deviations. Please make sure you don't worry before purchasing.

When not in use, store in a corrosion-resistant case.