12.5 mm (1/2″) square drive. Socket bits and operating elements made of chromium-vanadium steelContents:1 lever-action reversible ratchet (32 teeth)1 double hex socket bit ea. in AF 10, 11, 12, 13, 14, 15, 17, 19, 22, 24, 27, 30 mm1 socket bit ea. for screws with hexagon socket profile in 5, 6, 7, 8, 10, 12, 14 mm1 socket bit ea. for slotted head screws