The track clip is used for fix on the track and with a screw to the ceiling or other connector, which are widely applicable in lighting fixing. The material is steel, with zinc plating and then black paint, but we can also make  chrome, inox and colorful plating or painting surface treatment. The packing way is 50pcs in a polybag with small label, and 10 polybags in a carton 48x28x14mm.