This is a set of 17 SAE impact sockets with a drive size of 3/4 inches and a CR-MO alloy steel finish. Sizes included in this set are 1, 1 1/16, 1 1/8, 1 3/16, 1 1/4, 1 5/16, 1 3/8, 1 7/16, 1 1/2, 1 9/16, 1 5/8, 1 11/16, 1 3/4, 1 13/16, 1 7/8, 1 15/16, and 2 inches. These sockets come inside a heavy-duty blow moulded storage case.