Wiha Tools
Wiha Tools Open End Wrench 1/2 in 5-1/2 in 10 Degrees Insulated 20137
An insulated open-end wrench with a 10-degree offset head for safer work on live circuits
- TypeStrap Wrenches
- MaterialHAWA
- Insulated construction shields the user from live circuits
- 10-degree angled head reaches tight fasteners
- High-visibility coating makes the tool easy to spot
- One-piece alloy steel build resists rounding
- 5-1/2 inch overall length gives controlled leverage
Insulated Open End Wrench
This insulated open end wrench is built for electricians and maintenance technicians who work on live or potentially live SAE fasteners. The 10 degree offset head and high visibility coating help position the tool quickly in tight panels. A single ended, one piece alloy steel construction keeps the profile slim for restricted access. It is supplied new and carries California Proposition 65 warnings for cancer and reproductive harm.
Simple One Piece Installation
No assembly is required because the wrench is forged as a single piece; you simply select the 1/2 inch opening and engage the fastener. The rounded head profile reduces the chance of rounding off bolt corners when torque is applied. The insulation layer must remain intact, so inspect the coating before each use and discard the tool if cracks or cuts appear. The 10 degree angle is fixed and cannot be adjusted for different clearances.
Suited For Electrical Maintenance
This wrench suits professionals who need an insulated, SAE sized tool for 1/2 inch fasteners on energised equipment. The single ended design means only one head size is available, so buyers who need multiple openings or a ratcheting action should look at something else. The 5 1/2 inch overall length limits leverage on very tight joints, and the fixed 10 degree offset may not clear every obstruction. Users requiring metric sizes or a double ended configuration will need a different tool.
Highlights
- Insulated construction shields the user from live circuits
- 10-degree angled head reaches tight fasteners
- High-visibility coating makes the tool easy to spot
- One-piece alloy steel build resists rounding
- 5-1/2 inch overall length gives controlled leverage
Specifications
| Brand | Wiha Tools |
|---|---|
| Type | Strap Wrenches |
| Material | HAWA |
Questions about this item
How can I verify the wrench is working correctly after setup?
Check that the 1/2 in open end fits the fastener snugly, the 10-degree offset clears obstructions, the high-visibility coating is intact, and the insulated handle shows no cracks or wear before applying torque.
What comes in the box and what must I buy separately?
The package contains the single-end, one-piece alloy-steel open-end wrench with insulated handle; no additional accessories are included, so any other sizes or strap wrenches must be purchased separately.
Which version should I choose for a 1/2 in fastener?
Select model 20137 with a 1/2 in head size, 5-1/2 in overall length, 10-degree offset, SAE single-end design and insulated handle; other head sizes or non-insulated versions are different models.
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