Stanley Proto J3020 Open End Wrench 3/8 X 5/16
Product description 577-3020 Features: -Increased torque applied to fastener with fewer rounded edges. -Unique arc design increases surface contact by 400%. -Anti-Slip Design (ASD) wrench has a locking groove prevents slippage and knuckle injury. -Opening Type: Open/Open. Use: -Open End Wrench. Size: -3/8′. Quantity: -Single. Measurement Type: -SAE. Product Type: -Wrenches. Dimensions: Overall Product Weight: -0.08 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.