39-piece set. Very compact tool set for manual and machine use. The green locking elements of the Tool-Check secure the tools during transport. Includes one 1/4" bit ratchet in drop-forged solid steel design. Fine toothing mechanism (60 teeth) for a small return angle of 6° for precise working. Easy clockwise/counterclockwise switching. Ergonomically shaped ratchet head and lever. 1/4" sockets can also be used with the Wera 870/1 adapter (1/4" external hexagon to 1/4" external square head) included in the set. 7 Zyklop sockets (1/4", imperial sizes) for manual and machine-operated tools; with ball stop groove.