Wera Tools - 8796 SB Zyklop "flexible-lock" extension with free-turning sleeve, short, 3/8"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 3 8"" Zyklop ""flexible lock"" extension with free turning sleeve, short For 3 8"" square sockets with ball lock Flexible lock system for either