AMSUO 12-Step Titanium Coated HSS Step Drill Bit — Up to 2-3/8" (60 mm), Spiral Flute, 1/4" Hex Shank, for Sheet Metal & Thin-Wall Materials

AMSUO 12-Step Titanium Coated HSS Step Drill Bit — Up to 2-3/8" (60 mm)

A 12-step high-speed steel step drill bit with a bright titanium (TiN) coating and 1/4" hex shank, built for impact drivers and quick-change chucks. Twelve stepped diameters drill clean, burr-free holes in sheet metal and thin-wall materials — no pilot hole, no bit changes. The spiral flute pulls chips out fast, and the laser-etched size markings (up to 2-3/8"/60 mm) keep every hole precise.

Key Features

• 12 stepped diameters on one bit — 12 hole sizes, one tool
• Bright titanium (TiN) coating — extends edge life, reduces heat and friction
• Spiral (helical) flute — aggressive chip evacuation for fast, clean cuts
• 1/4" hex shank — direct fit for impact drivers and quick-change chucks
• Laser-etched fractional size markings: 7/8" to 2-3/8" (60 mm)
• Self-centering split tip — no walking, no center punching
• HSS material for consistent performance on steel, aluminum and plastics

Specifications

• Material: HSS (high-speed steel)
• Finish: titanium nitride (gold)
• Steps: 12
• Flute: spiral, with laser-etched size markings
• Max diameter: 2-3/8" / 60 mm (etched sizes: 7/8", 1", 1-3/16", 1-3/8", 1-5/8", 1-3/4", 2", 2-3/16", 2-3/8")
• Shank: 1/4" hex, HSS marked

Recommended Applications

• Impact-driver drilling in sheet metal, studs and thin-wall materials
• Electrical and low-voltage installation — panels, boxes, conduit
• HVAC ductwork and light-gauge fabrication
• Automotive body and trim work
• Plastic, PVC, acrylic and composite panels
• Quick-change production drilling where speed matters

Safety: Wear eye protection. Use cutting oil for steel. Let the bit do the work — do not force.