This is a side mounted top hung adjustable wardrobe door roller assembly used on the front sliding door panel. The bracket is a dial adjust design with a 1/8 in. offset and a 7/8 in. convex nylon roller. Used on 3/4 in. to 1-3/8 in. thick doors. Used by Stanley and a variety of manufacturers. For back panel see Prime-line part N 6649.