10-piece impact sleeve set 1/2". Hexagonal. Made of chrome molybdenum steel for easy cleaning and corrosion resistance. Stamped markings in millimetres for easy and quick identification. Includes 1/2" sockets in sizes 10, 12, 13, 14, 15, 17, 19, 21, 22 and 24 mm. Storage case is compatible with Ryb's LINK storage system. Limited lifetime warranty. Part of the Ryobi range of hand tools.