Step Drill Bit TiALN Coated Hex Shank Four Flutes

EXTRACUT TiALN-Coated Step Drill Bits with hex shank and four-flute design premium multi-size drilling solutions for professionals who demand precision, speed, and durability. Each bit contains multiple step diameters in a single tool, eliminating the need to carry dozens of individual drill sizes. The four-flute TiALN (Titanium Aluminum Nitride) coating provides extreme heat resistance and extended tool life in the toughest materials.

Key Features

• Four-Flute Step Design — Four-flute geometry (vs. conventional two-flute) produces cleaner holes with better roundness and faster chip evacuation at each step diameter.
• TiALN Nano Coating — Titanium Aluminum Nitride coating with 3500+ HV surface hardness provides oxidation resistance up to 800°C — ideal for stainless steel and heat-resistant alloys.
• Hex Shank (1/4") — Secure hex shank (6.35mm) prevents slippage in cordless impact drivers and provides maximum torque transmission.
• Laser-Etched Size Markings — Each step diameter is permanently laser-etched on the flute surface for quick size identification without measuring.
• Double-Ended Design (Select Models) — Some configurations offer double-ended step patterns for twice the tool life in a single bit.
• Wide Step Range — Each bit covers 10–15 discrete step sizes, replacing an entire drill index with 1–3 bits.

Applications

Electrical panel fabrication (conduit holes, cable entries), HVAC installation (multiple pipe/duct sizes from one bit), automotive bodywork (panel holes, wiring grommets), sheet metal fabrication, model making, and any application requiring multiple hole sizes in thin-to-medium gauge materials (steel, stainless, aluminum, wood, plastic).

Specifications