This wera zyklop 12 inch drive imperial socket set contains the following pieces 1 x zyklop 12 inch square drive ratchet 2 x zyklop 12 inch square drive extensions 5 inch and 10 inch1 x cross grip 1 x universal joint 18 x 12 inch square drive sockets 38 716 12 916 1932 58 1116 34 2532 1316 78 1516 3132 1 1116 118 1316 and 114 inch the zyklop ratchet is an innovatively designed ratchet with a swivelling head for better access to difficult to reach areas it has extra fine teeth for a small backlas