The wera 8100 sc 6 zyklop speed ratchet set contains a mixture of 12in sockets extensions bits and a ratchet perfect for a variety of jobs and tasks the 8000 b zyklop speed ratchet is suitable for 12in square sockets and 12in adaptors with square drive and is equipped with a ball lock the flywheel design and easy to grip free turning sleeve allow for faster work there is a swivel ratchet head with defined lock positions at 0 and 90 to the left and right it can be used like a conventional screw