This britool socket set comprises 10 metric sockets supplied on a rail the sockets are made if chrome vanadium steel and have a high chrome finish they have ogv profiles meaning that tightening torque is applied to the sides rather than to the angles of the nut iso 2725 1 din 3124 iso1174 1 iso 1711 1 and iso 691 the set includes the following sizes9 10 11 12 13 14 15 17 18 and 19mm