Stanley Proto J3021B Open End Wrench 3/8 X 7/16, Black
Product description 577-3021B Features: -Unique arc design increases surface contact by 400%. -Opening Type: Open/Open. -Head Angle: 15° Open Side. -Handle Type: Flat. Use: -Open End Wrench. Size: -3/8’/7/16′. Quantity: -Single. Measurement Type: -SAE. Product Type: -Wrenches. Dimensions: Overall Product Weight: -0.06 Pounds. From the Manufacturer Stanley Proto Open End Wrenches include the patented Anti-Slip Design (ASD) which has a locking groove to help prevent the wrench from slipping off of the fastener, reducing the chance of hurt knuckles. The ASD also has an arched surface that spreads the turning force over a contact area larger than a conventional wrench.