3/8" Drive Metric Semi Deep 6-Point Socket Range From Britool Hallmark
Traditional 6 point (hexagon) profile fits a nut perfectly. Socket lengths: 44 to 47mm. Available sizes: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15mm. They may show different sizes from this series. it has been the professional’s choice ever since.