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Gray Tools 57mm 12-point combination wrench with black oxide finish

Gray Tools

Gray Tools MC57B Combination Wrench 57mm 12 Point Black Oxide tool storage

SKU CH-Q8GT-Z9ZXJ

57 mm combination wrench with 12-point broaching and corrosion-resistant black oxide finish meets ANSI standards

  • 57 mm combination wrench for large fasteners
  • 12-point broached opening grips flats securely
  • Black oxide finish resists corrosion
  • Meets ANSI dimensional standards
  • California Proposition 65 chemical warning applies

Product Identity

The Gray Tools MC57B is a 57mm combination wrench with a 12 point drive for precise fastener engagement. It is built for professional mechanics and serious DIYers who need a single tool for both hex and box-end tasks.

Compatibility Check

Verify that the fasteners you service measure exactly 57mm across the flats before ordering. The 12 point broach requires sufficient clearance around the bolt head to seat fully without obstruction from adjacent components.

Sustained Use Behaviour

The black oxide coating resists corrosion during repeated exposure to shop fluids and humidity. Precision broaching maintains a secure fit over long periods of torque application, reducing rounding risk on stubborn hardware. Meets ANSI standards for dimensional accuracy and hardness.

Highlights

  • 57 mm combination wrench for large fasteners
  • 12-point broached opening grips flats securely
  • Black oxide finish resists corrosion
  • Meets ANSI dimensional standards
  • California Proposition 65 chemical warning applies

Specifications

BrandGRAY TOOLS

Questions about this item

Does the MC57B wrench ship alone or inside a case, and do I need to buy anything else to use it?

The wrench is sold as a single piece with no case or accessories included, and it requires no separate purchase to operate.

How do I decide whether the 57 mm, 12-point version is the right one for my fastener?

Choose this version when the bolt or nut measures exactly 57 mm across flats and you want the 12-point broach for easier engagement in tight spaces.

What does the ANSI compliance and black oxide finish mean for everyday workshop use?

ANSI compliance confirms the wrench meets recognised dimensional and strength tolerances, while the black oxide coating resists corrosion during daily use.

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