Made of chrome vanadium steel, Shot blasting finish, Plastic carry case to store and protect the tools, Rounded edges for comfort. Sizes: 8, 9, 10, 11, 12, 13, 14, 15, 17, 18mm & 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 7/8"