Contains: 10, 11, 12, 13, 14, 15, 16, 17, 18 and 19mm. Manufactured from quality chrome vanadium steel with hardened jaws and high polish mirror finish, corrosion-resistant and easy to clean. The jaws and ring are offset at 15° for easier location and application of torque to the fastener. Suitable for use in areas of very restricted access. Conforms to ASME B107.6.