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Open-end insulated wrench, 18 mm head, red coating

Wiha Tools

Wiha Tools Open End Wrench Insulated 20018 18 mm

SKU CH-S393-371TE

Insulated open-end wrench with 18 mm head, 6 3/4 in length and 10-degree offset for live electrical work

  • TypeStrap Wrenches
  • MaterialHAWA
  • Insulated single-end wrench safeguards live electrical work
  • 18 mm metric head fits standard fastener sizes
  • High-visibility coating improves identification in low-light conditions
  • 10-degree offset angle clears obstacles in tight spaces
  • One-piece alloy steel construction resists deformation under load

Insulated 18 mm Open-End Wrench

This Wiha Tools wrench is a single-ended, metric hand tool built for electrical work where live circuits may be present. The insulated construction and high-visibility coating help the user identify the tool quickly in low-light conditions. It is suited for electricians and maintenance technicians who require a 18 mm opening.

Upgrade from non-insulated wrenches

Replacing a standard open-end wrench with this insulated version adds a safety barrier when working on or near energised components. The jump is worth it whenever the task involves potential contact with live parts and the operator needs a 18 mm metric fit. The 10 degree offset aids access in tight panels.

Headroom for 18 mm fasteners

The 18 mm head size handles matching nuts and bolts commonly found in electrical enclosures and terminal blocks. Overall length of 6 3/4 in provides leverage for typical tightening torque without excessive force. The single-ended design limits use to one size, so a second wrench is needed for other dimensions.

Highlights

  • Insulated single-end wrench safeguards live electrical work
  • 18 mm metric head fits standard fastener sizes
  • High-visibility coating improves identification in low-light conditions
  • 10-degree offset angle clears obstacles in tight spaces
  • One-piece alloy steel construction resists deformation under load

Specifications

BrandWiha Tools
TypeStrap Wrenches
MaterialHAWA

Questions about this item

What is the head size of the 20018 open-end wrench?

The head size is 18 mm, fitting metric fasteners of that dimension.

How do I correctly position the 10-degree offset head on the fastener?

Engage the rounded, single-end jaw fully on the nut or bolt; the 10-degree angle provides clearance for the handle swing.

Will the high-visibility coating on the alloy-steel body wear off with heavy use?

The coating resists abrasion under normal use; inspect it periodically and replace the wrench if the insulation layer is damaged.

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