The 1/4 inch drive sockets (Length 25mm) have a bi-hex socket (12 point) end and are made from chrome vanadium steel with a high chrome finish. The OGV profile allows for tightening torque to be applied to the sides rather than to the angles of the nut. These sockets are for manual use only. ASME B 107-1, ISO 1174-1. Size: 3/16in Length: 25mm Weight: 7g https://elecena.pl/product/27240545/expert-e113740-bi-hexagon-socket-12-point-regular-1-4in-drive-3-16in 2024-11-12 https://elecena.pl/product/27240545/expert-e113740-bi-hexagon-socket-12-point-regular-1-4in-drive-3-16in 2025-03-13 https://elecena.pl/product/27240545/expert-e113740-bi-hexagon-socket-12-point-regular-1-4in-drive-3-16in 2025-03-25 https://elecena.pl/product/27240545/expert-e113740-bi-hexagon-socket-12-point-regular-1-4in-drive-3-16in 2026-05-06 https://elecena.pl/product/27240545/expert-e113740-bi-hexagon-socket-12-point-regular-1-4in-drive-3-16in 2026-07-13