Proto® Open End Wrench, SAE, 5/16 x 3/8 in Wrench Opening, 5-1/8 in Overall Length, 25/32 x 41/64 in Open End Width, 13/64 in Open End Thickness, 15 deg Head, 7/16 x 3/8 in Throat Depth, Flat Handle, Forged Alloy Steel, Satin
- Satin finish provides corrosion resistance and a slip-resistant grip
- Special heat treated alloy steel permits slim shanks for strength and durability
- Standard open end configuration
- Increased torque applied to fastener with fewer rounded edges
- Unique arc design increases surface contact
- Anti-slip design (ASD) wrench has a locking groove prevents slippage and knuckle injury