The Prime-Line N 6848 pocket door roller assembly is compatible with a variety of bypass, bi-fold, and pocket closet doors, offering smooth and quiet operation for your sliding door needs. This roller assembly features a top-hung, center-mounted tricycle design with 1 inch flat rollers, ensuring seamless and long-lasting door movement. Built with a steel bracket and durable plastic rollers, this pocket door assembly provides reliable strength and quiet functionality for heavy-duty applications. The threaded rod easily installs into the bracket at the top of the door, making this closet door assembly quick and simple to set up with basic tools. Designed for 1-3/8 inch thick doors and tracks with a 1-1/8 inch inside width. For further dimensional information, please see the line drawing and compare it with your original item before purchasing.