King Tony1/4″ Imperial Standard 6-Point Socket 5/16″Chrome vanadium alloy steel, polished, chrome plated.4 ball retaining grooves.ANSI/ASME B107.1: 5/16D1 (mm): 11.4D2 (mm): 11.8l (mm): 8L (mm): 24Weight (g): 11
Internal Reference: 230510S