A fastener assembly includes a metal first component having two flange portions defining a receiving slot therebetween, and a polymeric component received in the receiving slot in an assembled position. The first guide pattern has first openings each extending in a first direction and each first opening arranged in a direction perpendicular to the first direction. Such salts may be formed from a pharmaceutically acceptable base, for example an organic amine such as an amino alcohol, or from a pharmaceutically acceptable acid, for example a sulphonic acid or a sulphonic acid derivative. The gripping member is caused to rotate downward toward the spatula member when the gripping trigger is pulled. The LED assemblies are mounted to the bracket and sandwiched between the bodies of the guiding plates.