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Large black oxide combination wrench, 12 point open and box ends, matte dark finish

Gray Tools

Gray Tools 3180B 12 Point Combination Wrench 2-1/2" Black Oxide

SKU CH-3YJA-DT035

A 2-1/2 inch 12-point combination wrench with corrosion-resistant black oxide finish meeting ANSI standards

  • 12-point broaching gives a tight, secure fit on fasteners
  • Black oxide finish resists corrosion for longer tool life
  • Meets ANSI standards for professional-grade reliability
  • 2-1/2 inch hex size handles large industrial bolts
  • Prop 65 notice confirms regulated chemical disclosure

Professional 12-point wrench for heavy maintenance

The Gray Tools 3180B combination wrench fits 2-1/2" hex fasteners with a precision-broached 12-point box end. The black oxide finish resists corrosion in workshop environments. Meets ANSI dimensional standards for professional use.

Sustained torque on large hardware

The 12-point geometry engages flats securely, reducing rounding risk when high force is applied repeatedly. Black oxide coating maintains surface integrity during extended jobs. Designed for controlled, high-load fastening rather than quick, light-duty tasks.

Durable construction for daily shop use

Black oxide finish withstands exposure to oils, solvents and moisture common in automotive bays. The single-piece forging eliminates weak points under heavy leverage. California Proposition 65 notice applies — the product contains chemicals identified by the state as reproductive toxins and carcinogens.

Highlights

  • 12-point broaching gives a tight, secure fit on fasteners
  • Black oxide finish resists corrosion for longer tool life
  • Meets ANSI standards for professional-grade reliability
  • 2-1/2 inch hex size handles large industrial bolts
  • Prop 65 notice confirms regulated chemical disclosure

Specifications

BrandGRAY TOOLS

Questions about this item

Does the 12-point broaching on the 3180B generate heat during extended use?

The wrench is a hand tool with no moving parts, so it produces no heat or noise regardless of how long it is used.

What drive size must my ratchet or breaker bar have to work with the 3180B?

The wrench has a 2-1/2 inch hex opening and no square drive, so it fits directly onto fasteners without a ratchet or breaker bar.

Will the black oxide finish on the 3180B react with older chrome-plated sockets in my toolbox?

The black oxide coating is corrosion resistant and chemically stable; it will not corrode or transfer onto adjacent chrome tools.

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