Door wheels replacement with anti collision block and screws included; finely crafted with a smooth burr surface for a tight fit that slides smoothly on rails without jams. Basic mounting parts provided for easy installation; simply remove the old rollers, screw in the ones and the anti collision block using a screwdriver, and then adjust the height for a fit. Materials are corrosion resistant and rust resistant, with a strong load bearing capacity. You can expect smooth sliding and long lasting durability. Versatile and compatible with a wide range of applications, including display cabinets, reptile feeders, nightstands, dressers, organizers, storage cabinets, and shower room doors. Use scenarios Display cabinet: worn rollers to restore smooth opening and closing and reduce sticking. Reptile enclosure: upgrade the door or feeder cabinet for quiet, reliable operation. Bedroom furniture: refurbish a nightstand or dresser to improve drawer or door glide and overall durability.