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Gray Tools 157B-I 1/4 inch insulated combination wrench with orange and yellow safety layers

Gray Tools

Gray Tools 157B-I 1/4" 1000V Insulated Combination Wrench

SKU CH-A0K3-CQ83T

A 1/4 inch 12-point combination wrench insulated to 1000 V with dual-colour safety layers tested to ASTM F1505

  • 1000 V insulated protection for live electrical work
  • Dual orange and yellow layers show insulation damage at a glance
  • 12-point drive engages fasteners from multiple angles
  • Tested to ASTM F1505 standard for verified safety
  • Compact 1/4 inch hex size fits tight spaces

Gray Tools 157B-I 1/4" Insulated Wrench

The Gray Tools 157B-I is a 1/4 inch combination wrench insulated for work up to 1000 V. It features a 12-point drive and a dual-layer insulation system with an orange outer layer over a yellow inner layer that acts as a visual safety indicator. Each wrench is individually tested to ASTM F1505 standards. This tool is built for electricians and technicians who work on live or potentially live electrical equipment.

Suited for 1000 V electrical tasks

This wrench suits professionals who require verified 1000 V insulation protection on a 1/4 inch fastener. The 12-point drive engages fasteners efficiently in confined spaces. Buyers needing different hex sizes or drive configurations should look at other options, as this model is specific to the 1/4 inch dimension. It is not intended for general mechanical work where electrical insulation rating is not required.

1000 V ASTM F1505 insulation rating

The decisive specification is the 1000 V rating backed by individual testing to ASTM F1505. The yellow inner insulation layer provides an immediate visual cue if the outer orange layer is compromised. This certification and the dual-layer design confirm the wrench meets the safety standard for high-voltage environments. Without this specific rating and testing protocol, the tool would not be suitable for the intended electrical applications.

Highlights

  • 1000 V insulated protection for live electrical work
  • Dual orange and yellow layers show insulation damage at a glance
  • 12-point drive engages fasteners from multiple angles
  • Tested to ASTM F1505 standard for verified safety
  • Compact 1/4 inch hex size fits tight spaces

Specifications

BrandGRAY TOOLS

Questions about this item

When does the dual-layer insulation need replacement?

Replace the wrench once the yellow safety layer becomes visible through the orange outer insulation, as this indicates the 1000 V protection is compromised.

What limits continuous use on live circuits?

The ASTM F1505 rating certifies protection up to 1000 V; exceeding this voltage is the primary limit during sustained electrical work.

Does the tool generate heat during all-day electrical jobs?

No, the insulated combination wrench produces no heat during operation since it contains no electrical or moving components.

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