High quality and durable: The adjustable door guide rail is made of high quality metal material, surface painted, rust-proof and durable. Made from durable plastic, our large rollers are designed to roll quietly and smoothly, preventing your door from getting scratched. NO DRILLING, NO DAMAGE TO THE FLOOR: This floor track ensures high-performance sliding barn doors and prevents the door from swinging sideways. Easy to install, no drilling required, no damage to your floors. Packing list: 1 floor guide, 1 set of screws. Enough accessories to help you install, the size is (L x H x D): about 4.5 x 2.7 x 4.8cm/1.77 x 1.06 x 1.89in. For sliding doors 1 to 1-3/8 inches thick. WIDE APPLICATIONS: Sliding doors and barn doors are becoming increasingly popular in modern residential and commercial applications. For barns, garages, storage doors, gates, cabinet doors, wooden dressers, double door cabinets, closets, bathroom showers, bedrooms. This style is suitable for all doors. Easy to install: We have included everything you need to install the casters easily and easily. Simply mount it on the wall and tighten the screws to ensure smooth sliding. Plus, it's perfect when you can't drill holes in the floor or don't want to damage your expensive hardwood floors. describe: This floor rail was developed for sliding doors and prevents the door from swinging sideways. It attaches to the wall behind the door, eliminating the need to drill holes in the floor. Specification: Condition: 100% new Adjustment width: 2.5-3.8 cm Material: carbon steel Black color Dimensions (L x H x W): approx. 4.5 x 2.7 x 4.8 cm/1.77 x 1.06 x 1.89 inches Weight: about 118g Screw size: diameter 5mm * length 38mm