This is a 48-inch stainless steel track cap used to repair damaged patio or wardrobe door tracks. It can be cut to desired length. After the old track is prepared by grinding any spots that are wider than the original track width and cleaning it, the new track is simply pressed onto the old track after squirting a thin bead of silicone glue in the replacement track. Using a rubber mallet and a block of wood, the replacement track is snapped down over the old track.