[Easy to install] Mounting screws included, no drilling required. You can easily install floor rails without damaging your flooring. [Wide Span] Fits sliding barn doors from 1 to 1-3/8 inches thick. Please refer to the size in the picture before purchasing. [Smooth and Quiet Sliding] This barn door floor track ensures a high level of performance for your sliding barn door and prevents the door from swinging sideways. You can rest assured that your barn door will experience extremely smooth sliding on our floor tracks. [Floor Wall Guide] This guide mounts on the wall behind the door and is invisible, which will give your sliding door a sleek look. [High quality material] - The floor guide rails are made of high quality carbon steel, strong, tough, durable and has a long service life.