A safety - must have! These are loose wheel nut indicators that are used extensively by the transport industry as part of their fleet safety roadworthiness procedures, daily walk-round inspection and defect reporting and scheduled maintenance requirements. They allow for accurate monitoring for loose wheel nuts thus preventing wheel hub damage or the loss of a road wheel should a wheel nut loosen. The indicator is fixed to the wheel nut by gripping the six corners of the hexagon of the wheel nut. When the wheel is being fitted out the checkpoint indicator pointers should be aligned and set in a recognisable pattern. Should a wheel nut loosen off, the checkpoint indicator has no option but to move with the nut and so break the recognisable pattern that was set, thus indicating the wheel nut has begun to rotate and therefore to loosen.