Product details : STAHLWILLE 1/4 INCH DRIVE X 6MM SOCKET HEXAGON
Metric Sizes: DIN 3124/ISO 2725-1, ASME B 107,5M E DIN EN 3709 (Test values), American sizes: ASME B 107.1, Fed. Spec. GGG-W-641, SAE AS 954-E (test values), HPQ-high performance steel, chrome plated.