Klein Tools - For Professionals Since 1857

Lineman's Insulating 4-in-1 Box Wrench


  • Box Wrench meets the ASTM 1505-10 standard 1000V rating
  • See-through insulating handle confirms metal ends are not connected
  • 1/2-Inch, 9/16-Inch, 5/8-Inch and 3/4-Inch sizes in one tool; 12 point sockets
  • Reverse ratcheting action by reversing switches on each end of the wrench
  • Made in USA
  • Covered gear mechanisms protect from dirt and debris
  • Higher gear tooth count reduces the swing arc
  • Larger pawl allows for easier direction change while wearing class 2 gloves
  • Textured grooves in handle prevent slipping
  • Chrome plated finish resists corrosion
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Interactive Catalog

The Klein Tools Lineman's Insulating 4-in-1 Box Wrench is the only double ended 4-in-1 wrench on the market to meet the ASTM standard 1000V rating. It features a transparent handle that shows the metal ends of the wrench are not touching. The solid, durable wrench features four 12 point socket sizes: 1/2'', 9/16'', 5/8'', and 3/4''.

1/2'', 9/16'' 5/8'', 3/4''
Number of Points:
Overall Length:
9'' (22.9 cm)
11.2 oz (318 g)
Additional Information
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  • Always wear eye protection.
  • Do NOT push or hammer wrench.
  • Do NOT extend handle length.
  • Inspect before each use.
  • Because moisture, films, or other surface contaminants are conductive, Klein insulating tools must be kept clean, dry and free of any surface contaminants.