Wera Tool-Check 1 38 Pieces Metric 0504905000138 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