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Facom half-moon obstruction box wrench 10x12mm satin finish

Facom

Facom FM-57.10X12 Obstruction Box Wrench 10x12mm

SKU CH-Y39S-NWC8T

Half-moon obstruction box wrench with 10 mm and 12 mm heads reaches inaccessible nuts in tight spaces

  • Half-moon shape reaches obstructed fasteners
  • Dual 10 mm and 12 mm heads cover two common sizes
  • Satin finish resists rust and corrosion
  • Alloy steel construction withstands demanding use
  • 10 mm length provides leverage in tight spaces

Obstruction wrench for tight access

The Facom FM-57.10X12 is a double-ended obstruction box wrench with 10 mm and 12 mm heads. Its half-moon profile lets mechanics reach fasteners that a straight wrench cannot engage. The tool suits automotive and maintenance tasks where clearance is limited.

Alloy steel build with satin finish

The wrench is forged from alloy steel for strength in demanding environments. A satin coating resists rust and corrosion during daily shop use. No moving parts or powered elements mean silent operation and zero energy draw.

Fits 10 mm and 12 mm fasteners

The two head sizes cover common metric hardware without needing a second wrench. The offset shape frees knuckle room around obstacles such as brackets or pipework. Buyers needing other sizes or a ratcheting mechanism will require additional tools.

How it compares

Measured against everything we stock in Pliers, Wrenches & Gripping Tools, at today’s prices. Recalculated every night.

Price $16.99
Cheaper than about 64% of the 2,110 comparable items (median $23.99).

Specifications

Product
Brand nameFACOM

Questions about this item

How do you fit the half-moon head onto a 10 mm or 12 mm fastener without rounding the corners?

Slide the box end straight onto the nut so the full 12-point profile engages, then apply steady torque; avoid rocking the wrench because the curved neck reduces leverage if the head is not fully seated.

What wear should I expect on the satin-finish alloy steel over time?

The satin coating resists rust, but heavy daily use will gradually polish the contact faces; inspect the 10 mm and 12 mm openings for rounding and replace the wrench when the fit becomes loose.

At what point does the 5-5/8 in length limit the torque I can apply on a stuck 12 mm nut?

The short 5-5/8 in handle caps maximum leverage, so on a seized 12 mm fastener you will hit the tool's torque limit before the bolt breaks; use a breaker bar instead for high-force jobs.

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