12.5 mm (1/2″) square drive. Metric and SAE. Socket bits and operating elements made of chromium steel. Chrome-plated Contents:1 lever-action reversible ratchet (36 teeth) with 2-component handle1 double hex socket bit ea. in AF 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 30, 32, 34 mm 1 double hex socket bit ea. in AF 3/8, 7/16, 1/2, 9/16, 19/32, 5/8, 11/16, 3/4, 25/32, 13/16, 7/8, 15/16, 1, 1 1/16, 1 1/8, 1 3/16, 1 1/4 inch1 extension ea. in 75, 130, 255 mm1 T-handle with sliding collar, L 300 mm1 universal joint