They are from a kitchen installed between 15-20 years ago. they fit into a location under and at the back of the drawer and run on ball bearings [url]https://s1274.photobucket.com/user/sparish73/media/public/IMAG2093_zpshxmmfizn.jpg.html[url] [url]https://s1274.photobucket.com/user/sparish73/media/p...