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Wiha insulated box-end wrench 5/16 inch 12-point finish

Wiha Tools

Wiha Tools 5/16" Box End Wrench SAE Insulated 12 Point

SKU CH-Q66Z-4196P

Insulated 12-point box end wrench sized 5/16 inch for protected fastener work

  • Product typeStrap Wrenches
  • Main materialHAWA
  • 12-point box end grips fasteners securely
  • Insulated finish protects against electrical hazards
  • 5/16 inch SAE size fits standard hardware
  • 6-5/16 inch length provides leverage
  • California Proposition 65 chemical warning applies

5/16" Insulated Box End Wrench

This 12 point box end wrench is built for professionals who need insulated hand tools on the job. The SAE sizing fits standard fasteners in electrical and maintenance applications. It is a new hand tool designed for safe gripping on live or grounded hardware. The insulated finish helps protect the user during electrical work.

Sustained grip on insulated handle

The insulated finish provides a consistent barrier during extended use on site. HAWA material construction supports durability when torque is applied repeatedly over long periods. The 12 point box end maintains contact with the fastener flats to reduce rounding under sustained load. This design helps the tool perform reliably through continuous daily tasks.

Replaces worn non insulated wrenches

This wrench upgrades a toolkit when the existing box end wrenches lack insulated protection. The jump is worth it for electricians and technicians who face Proposition 65 listed chemicals on older tools. It addresses the need for a compliant insulated option where standard steel wrenches fall short. Buyers who need a different drive size or open end style should look elsewhere.

How it compares

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

Price $24.99
Typical for this category: the median of 2,110 items is $23.99.

Specifications

Product
Brand nameWiha Tools
Product typeStrap Wrenches
Size & build
Main materialHAWA

Questions about this item

Does the insulated finish on the 12-point box end wrench affect heat transfer during prolonged use?

The insulated finish is designed for electrical protection and does not change the tool's heat dissipation during normal mechanical work.

What fastener size does the 5/16-inch box end wrench require to function?

It fits SAE fasteners with a 5/16-inch hex head, so you must already have bolts or nuts of that exact size.

Will the 12-point box end engage older 6-point SAE fasteners without rounding?

Yes, the 12-point geometry allows engagement on 6-point heads, though a dedicated 6-point wrench provides more contact area for high torque on worn fasteners.

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