[Reliable Performance]Designed for sliding patio doors, our roller assembly ensures smooth operation with ball bearings. [Versatile Design]Works with most sliding doors and windows, providing universal compatibility for easy installation and replacement. [Durable Materials]Made from premium stainless steel and copper, offering resistance and extending the lifespan of your door rollers. [Complete Kit]Includes 4 rollers and 8 screws, providing everything you need for a quick and efficient replacement of damaged rollers. [Enhanced Safety]Improves the operation of glass doors, making your home or office safer with reliable fitting hardware., Manufacturer: Pissente