High Quality: The sliding door guide rail floor mount is made of solid carbon steel, which is firm and durable. The surface is coated with black powder to ensure its stability and wear resistance. The surface of the nylon roller is made of POM material, which can prevent scratches Multiple Combinations: The sliding barn door floor Guide has 8 installation options, allowing you to set your favorite floor guide, making it suitable for personal DIY Unique Design: The wall-mounted barn door floor guide rail can be directly fixed to the wall by two flat-head screws, eliminating the need to drill another hole in the floor Easy to Install: The door floor guide rail includes the screws and hardware required for installation, making installation and adjustment convenient and fast Wide Application: Adjustable warehouse door rollers are suitable for most warehouse doors. It can be used for barn doors, wardrobes, TV cabinets, living rooms, bedrooms, kitchens, warehouses, dining rooms, garages, etc Note: The door floor guide require a minimum clearance of 0.28 inches between the door bottom and the floor for installation HOME MASTER HARDWARE Sliding Barn Door Floor Guide,Use for Door Frame Bottom Adjustable Rollers,Wall Mounted Flush Flat Bottom Design,Smoothly and Quietly,1 PCS Black with Screw