[FLOOR]: Our barn door running tracks are specially designed to keep the bottom bracket absolutely flat on the floor, not scratched by screws/bolts/nuts, more stable and beautiful. 'need no grooves, noneno hole is needed in the floor, perfect for carpets or tiles. Easy and Quick Installation and Adjustment: 2 sliding door tracks with two screws, 8 different mounting options, requires detailed instructions/tools, easy and easy to install for everyone. Just adjust and tighten thescrews at the bottom to fix the 3 wheels where you feel best. Sturdy and Dependable: The high-strength solid steel base and black powder coated finish complements any decor style and provides visual appeal for many years to come; high-precision POM rollers onlyleave no marks, and the sliding door is smooth and quiet without wobbling. General Safety Instructions: Sliding door tracks are rust resistant and durable, suitable for all types of interior and exterior doors, sliding top for single/double barn doors, can be used inbedrooms, closets, bathrooms, living rooms, kitchens, pantries, dining rooms, garages, etc.