AMSUO 13-Step Black Chrome HSS Step Drill Bit — Up to 2-3/8" (60 mm), Straight Flute, Round Shank, for Sheet Metal, Conduit & Plastic

AMSUO 13-Step Black Chrome HSS Step Drill Bit — Up to 2-3/8" (60 mm)

Thirteen hole sizes, one bit, one pass — drill, deburr and ream without changing tools. The stepped cone design with durable black chrome (gunmetal) finish drills clean holes in sheet metal, electrical enclosures, conduit and plastic, while etched fractional markings on the flute hit the exact diameter every time. Factory-direct from a 20-year precision-tools manufacturer with ISO 9001 / 14001 / 45001 triple-system certification.

Key Features

• 13 stepped diameters on one bit — drill multiple hole sizes without bit changes
• Black chrome (gunmetal) finish — corrosion-resistant, reduces friction and galling
• Straight flute with brushed interior — efficient chip evacuation in thin materials
• Size-marked steps: etched fractional markings up to 2-3/8" (60 mm) for precise sizing
• Self-centering tip starts without walking or center punching
• Round shank with flat side — non-slip grip in standard drill chucks
• HSS (high-speed steel) construction — long edge life on steel, aluminum and plastics

Specifications

• Material: HSS (high-speed steel)
• Finish: black chrome (gunmetal grey)
• Steps: 13
• Flute: straight, chip-removal flute with size markings
• Max diameter: 2-3/8" / 60 mm (etched sizes: 1-3/8", 1-5/8", 1-3/4", 2", 2-3/16", 2-3/8")
• Shank: round with flat side, HSS marked

Recommended Applications

• Sheet metal, steel plate and thin-gauge metal drilling
• Electrical work — enclosures, panels, junction boxes, metal conduit
• HVAC — ductwork and light fabrication
• Auto body and repair — clean holes in panels without distortion
• Plastic, PVC and composite materials — smooth, crack-free holes
• Deburring and reaming existing holes to size in one pass

Safety

Wear eye protection. Use cutting oil for steel. Reduce speed on larger steps and let the bit do the work.

Quality & Certification

Produced in an ISO 9001 / 14001 / 45001 triple-certified facility — every bit is inspected before packing.

FAQ

Why use a step drill instead of twist drills?

One stepped bit replaces a whole set of twist drills for thin materials — deburring and reaming in the same pass, with no pilot hole needed.

Which shank does this bit have?

A round shank with a flat side for non-slip grip in standard drill chucks.

Can this bit be private-labeled?

Yes — custom branding, packaging and bulk programs are available.

Get a Quotation

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