These Faithfull Chrome Vanadium spanners have flexible ratchet heads, which can turn through 180°, allowing them to be used in more awkward to reach places at any angle. Each spanner has a 72 fine-tooth mechanism. A useful arrow illustration is etched in the spanner to indicate the direction of torque.180° head for access into tight places.5° Fine Ratchet Mechanism. Ref: UTTK12710