Stable drawer guide. Looks good and easy to assemble with the screws provided. The only problem I have is the self-locking mechanism. When the drawer is about 3/4 inch tall, a mechanism is activated that pulls it all the way out. Maybe it's related to the set I have or it could be a feature. The drawer pull appears to hit a 3/4 inch barrier where the mechanism hooks rather than moving entirely smoothly. Anyway - they work and they are installed.