Expert by Facom E117051 1/2" socket is a 12-point, metric 8mm socket. It is manufactured to meet several industry standards including ISO 2725-1, DIN 3124, ISO 1174-1, ISO 1711-1, and ISO 691. Constructed from chrome vanadium steel with a high chrome finish, this socket features the OGV Profile which ensures tightening torque is applied to the sides of the nut rather than the angles, preventing damage. This socket is designed for manual use only.