Wera Zyklop extension with flexible-lock: when activated the sockets are secured and permanently fixed, any unintentional loss being avoided. When the system is deactivated, the sockets can be quickly attached and exchanged. Equipped with a free-turning sleeve for faster turning of screws and nuts. Features and Benefits1/2" Zyklop "flexible-lock" extension with free-turning sleeve, longFor 1/2" square sockets with ball lockFlexible lock system for either locking or rapid exchange of the attached toolWith free-turning sleeve for rapid tightening and loosening of screws and nutsChrome vanadium steel, matt chrome-plated Contents 8796 LC Zyklop "flexible-lock" extension with free-turning sleeve, long, 1/2", 1/2" x 250 mm