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)

A professional 13-step high-speed steel step drill bit with a durable black chrome finish, engineered to drill 13 hole sizes in thin materials without changing bits. The stepped cone design drills, deburrs and reams in one pass — ideal for sheet metal, electrical enclosures, conduit and plastic. Etched fractional size markings on the flute let you hit the exact hole diameter every time.

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.