Wera Tools - 8100 SA 4 Zyklop Speed Ratchet Set, 1/4" drive, imperial41 piece Zyklop starter set with the essential ratchet components in a robust metal case: Zyklop ratchet with 1 4""drive. The 72 fine pitched teeth enable a low return angle of only 5 . The ratchet head pivots freely and can be locked into any position by using the slide switch that is positioned on either side. It is even possible to work conveniently in very confined and difficult to access areas with enhanced hand clearance. The predefined locking