- Material and durability The barn door hardware kit is built from 1/4 inch thick carbon steel with a maximum load of 265 lbs. The barn door wheel is made of POM, stronger than standard plastic or nylon. The spacers are carbon steel for greater stability. Bolts and leg screws are 8.8 grade for long-lasting performance. The surface is finished with a black powder coat for anti-rust protection and a smooth appearance. - Easy installation Track has 16 inch pre-drilled hole spacing. Step-by-step instructions are included, covering every installation step from A to Z. You can complete the installation in about 30 minutes with two people. If you encounter any problems or are missing parts, please contact us via Amazon. - Size and compatibility The 6FT kit fits door panel width up to 36 inches and door thickness from 1-3/8" to 1-3/4". If your door panel is too thin, you can use the included 5 mm black spacer pad. If your door is too thick, you may need to buy longer bolts. If you have doorway trim, you may need to add an extra trim board to install the track or remove the trim. - Why us All barn door track and roller components are factory inspected before delivery and have passed 100,000 opening and closing cycles to ensure reliable operation. Get a high-quality barn door hardware kit at manufacturer price.