Wera 8100 SB 7 Metric 29 Piece 3/8" Metal Zyklop Push Ratchet & Socket Set. Model: 004047. Features: Wera Zyklop Metal-Push Slim ratchets have extremely slim handles and heads, with long leverage. These forged, full metal ratchets are made from chrome molybdenum and are very robust without any torque limitation. The ratchet has a push-through square drive to change the direction of the ratchet. A secure socket lock mechanism prevents unintentional switchover. The ratchet mechanism has fine teeth, giving small increments of just 4.7°. The Metal-Push Slim Ratchet has the following specifications: Drive: 3/8in square. Length: 222mm. Head dimensions: 27 x 29mm. This 29 piece Zyklop 3/8in Drive metric socket set comprises: 1 x 3/8in Zyklop Metal-Push ratchet. 9 x 3/8in hex sockets: 8, 10, 12, 13, 15, 16, 17, 18, 19mm. 1 x 3/8in wobble extension: 76mm. 1 x 3/8in extension.