The wera 8100 sb 6 zyklop speed ratchet set contains a mixture of 38in sockets extensions bits and a ratchet perfect for a variety of jobs and tasks the 8000 b zyklop speed ratchet is suitable for 38in square sockets and 38in 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 defined lock positions at 0 and 90 to the left and right as well as at 15 before 90 inwards at 0 it