8-in-1 option: There are 8 different mounting methods. Just fix two screws in the bottom bar, then pull the roller guides in place.Our sliding door track is made of carbon steel, black coating resists wear and corrosion and provides longer service life.Sliding performance: The smooth roller can slide easily, then slide the door open without difficulty. The bottom of the floor guide is flat and does not damage the door and the floor.Compatible with all sliding doors.8 in 1 Floor Guide Adjustable Sliding Barn Door Guide, Wall Mounted Door Bottom Floor Guide BlackMultifunctional Barn Door Bottom Floor Guide Adjustable Roller Floor Guide compatible with Sliding DoorsFeature:- Installation takes 5-10 minutes and you have crafted hardware that we offer.- The doors move smoothly back and forth without noise.- Opening at the bottom of the channel saves your wall and extends the life of your existing barn door hardware by reducing colliding between doors and wall.- Adjustable and usable for door leaves from 30mm to 84mm.How to install:1. Measure the thickness of the door.2. Adjust the roller in the floor guide to make sure there is enough space for the door, just slide the film inside, then tighten the screw at the bottom of the floor guide.3. Mount it on the wall with screws.Specification:Material: carbon steelDimensions: 11.1 x 6.2 x 4.9cmMounting methods: 8 in 1 option as the pictureCompatible with doors with a thickness of 30 to 84 mmColors: blackPackage includes:1 x floor guide2 x screws1 x hex wrench2 x ribbed plastic pegs2 x threaded rod