Bottom-Lock Plastic Fence Slats provide privacy and added security to a standard 2" diamond size chain link fence. Each bag of slats provides 10FT of coverage. Installing the slats is easy. First, insert the bottom lock track into the bottom most diamond of the chain link fence. Second, slide each slat into the fence until it clicks into the locked position; the clicking occurs because the track has a one way locking system that allows the slat to slide into the track. Each slat has a channel that has been removed so that it will lock the bottom track into the opening on the slat (see photos for example).