an initially flat metal stock 42 is bent to a hook shape at one end and has side rails 44 integrally formed along the lateral edges 42a thereof it will be appreciated that the rails 44 are formed in a configuration such that the edges 42a face against the standard visor surface to which it is mounted fig8 and 9 illustrate a further embodiment of the clip 22 wherein a pair of plastic side rails 58 are mounted on one side and along the lateral edges 22b thereof the rails 58 have a width of approximately 1 4 3 8 inch and are formed with substantially flat surfaces 58a in this embodiment a member 60 is fastened across the top edge of the rails via rivets 62 that also serve to secure the rails 58 to the clip 22 the cross member 60 is intended to provide a stop for the magnet 24 when it is slid to the top position of the clip as illustrated by the ghost line showing 24 39 and its raised position also illustrated in fig1 by reference numeral 10 39 an additional rivet 64 may be provided at the bottom of the clip 22 to further limit the extent that the magnet may be moved in that direction it will be appreciated that the cross member 60 provides a convenient finger hold for maintaining the clip stationary on the visor 12 when positioning the filter 20 via the magnet 24 for.