An apparatus for visually indicating a loose wheel nut (57, 58) on a motor vehicle, in which a wheel of the motor vehicle has a plurality of wheel nuts (57, 58), and the apparatus is engagable to a first pair of the wheel nuts (57, 58), and another of the apparatus is engagable to a second pair of the wheel nuts (57, 58) which are adjacent to the first pair, the apparatus comprising: (a) a first means for engaging a first wheel nut (57, 58) so as to be rotatable therewith, and having a first pointer (18, 20) for indicating a start position of the first engaging means, (b) a second means for engaging a second wheel nut (57, 58) adjacent to the first wheel nut (57, 58) so as to be rotatable therewith, and having a second pointer (18, 20) for indicating a start position of the second engaging means, and (c) an elongate member which is resiliently flexible and which interconnects the first and second engaging means, the elongate member being configured to curve in at least two directions and having a first end portion (28, 30) and an opposed second end portion (28, 30), wherein the first end portion (28, 30) is connected to the first engaging means and the second end portion (28, 30) is connected to the second engaging means, such that, in use, any loosening rotation of the first wheel nut (57, 58) will cause the first engaging means and its pointer (18, 20) to rotate therewith, thereby providing a visual indication of a loosening of the first wheel nut (57, 58), characterised in that the start position of the first engaging means indicated by the first pointer (18, 20) and the start position of the second engaging means indicated by the second pointer (18, 20) are such that the first pointer (18, 20) of the first engaging means of the apparatus points in a direction that is aligned with a direction of pointing of the second pointer (18, 20) of the second engaging means of the other apparatus. (a) a first means for engaging a first wheel nut (57, 58) so as to be rotatable therewith, and having a first pointer (18, 20) for indicating a start position of the first engaging means, (b) a second means for engaging a second wheel nut (57, 58) adjacent to the first wheel nut (57, 58) so as to be rotatable therewith, and having a second pointer (18, 20) for indicating a start position of the second engaging means, and (c) an elongate member which is resiliently flexible and which interconnects the first and second engaging means, the elongate member being configured to curve in at least two directions and having a first end portion (28, 30) and an opposed second end portion (28, 30), wherein the first end portion (28, 30) is connected to the first engaging means and the second end portion (28, 30) is connected to the second engaging means, such that, in use, any loosening rotation of the first wheel nut (57, 58) will cause the first engaging means and its pointer (18, 20) to rotate therewith, thereby providing a visual indication of a loosening of the first wheel nut (57, 58), characterised in that the start position of the first engaging means indicated by the first pointer (18, 20) and the start position of the second engaging means indicated by the second pointer (18, 20) are such that the first pointer (18, 20) of the first engaging means of the apparatus points in a direction that is aligned with a direction of pointing of the second pointer (18, 20) of the second engaging means of the other apparatus.