Full Polish Open End Wrench, 5/16-in x 3/8-in, 5-1/8-in LDesigned for superior performanceAvailable in a broad range of sizes & sets both SAE & MetricsForged and machined for best fit and unyielding strengthPrecision heat-treated and tempered for optimal hardness, ductility and durabilityEasy to read stamp pattern in order to quickly