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Six insulated chrome box wrenches with 12-point heads

WIHA

WIHA 21391 Insulated Box Wrench Set 6pc 12-point

SKU CH-0QHV-0HAT9

Six-piece insulated box wrench set with 12-point heads ranging from 3/8 in. to 3/4 in., built from alloy steel with a chrome finish for durable fastening across automotive, machinery and home projects

  • Insulated safety for live electrical work
  • 12-point heads grip fasteners on worn or frozen surfaces
  • Alloy steel construction resists wear through heavy use
  • Chrome finish protects against corrosion in damp environments
  • Six-piece range covers common automotive and machinery fasteners

Insulated Box Wrench Set 6pc

The WIHA 21391 set contains six insulated combination wrenches with a chrome finish. Sizes range from 3/8 in. to 3/4 in. for common fastening tasks. Alloy steel construction provides durability and resistance to wear. The 12-point heads deliver increased grip on difficult surfaces.

Fit in a toolkit

These wrenches cover a standard range of imperial sizes for nuts and bolts. The insulated design adds a layer of protection for electrical work environments. Alloy steel handles repeated torque without deformation. The set frees up space by replacing multiple individual open-end tools.

Who this suits

Electricians and maintenance technicians working near live circuits benefit from the insulated coating. DIY users handling automotive, machinery or furniture assembly gain a versatile size spread. Buyers needing metric sizes or a larger piece count should look elsewhere. Those requiring open-end profiles will need a different configuration.

Highlights

  • Insulated safety for live electrical work
  • 12-point heads grip fasteners on worn or frozen surfaces
  • Alloy steel construction resists wear through heavy use
  • Chrome finish protects against corrosion in damp environments
  • Six-piece range covers common automotive and machinery fasteners

Specifications

BrandWIHA

Questions about this item

What is the maximum torque these insulated box wrenches can handle before the 12-point heads slip?

The 12-point heads provide increased grip on nuts and bolts, especially on difficult surfaces like bare metal or frozen parts.

Do the chrome-finished alloy steel wrenches become too hot to hold after continuous use on automotive jobs?

Hand tools do not generate heat during normal operation, so the wrenches remain at ambient temperature.

Does this 6-piece set require a separate torque wrench or calibration tool to work properly?

The set functions as standard box wrenches for tightening and loosening fasteners; no additional tools are needed for basic use.

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