- Facom R Series 1/4" Drive Metric Hexagon Socket - Precision-designed for a perfect fit on 11mm fasteners - Complies with industry standards: NF ISO 2725-1, NF ISO 1711-1, ISO 2725-1, ISO 1711-1, DIN 3124, ASME B107.5 - 1/4" square drive e…View more