This sliding wooden door hardware kit is made of high-quality steel and is coated with black powder to ensure corrosion resistance and durability. High strength industrial grade tracks and pulleys can easily withstand 300 pounds of load provides a smooth and sturdy rolling performance. We provide step-by-step graphic and text instruction. It is very easy for you to take a reference during the installation. The barn door hardware kit comes with 2 kinds of wall fastener, expansion screws are used for cement walls, ordinary screws are used for wood walls and cabinets, etc. The barn door is operated by sliding rails, which can save more space compared to traditional door opening methods. It is particularly suitable for small units or situations that require maximum space utilization. Fit door width up to 76”;Fit Door Thickness 1-1/4″ 1-3/4″. The height from top of the door to the top of the roller is 6. The gap between door and wall is about 5/8. 1, 3.3ft rail ×2: which is made of carbon steel, provides a smooth and sturdy rolling performance. 2, Spacers×5, used to keep space between the wall and the rail. 3, Rollers×4, made of carbon steel hanger and nylon wheel with ball bearing makes your door moving stably and in low noise. 5, Rotating shaft and all hardware fasteners×1. Customer questions & answers. Q: How much space do i need to keep from ceiling to doorway? A: At least 6. Q:My door is in thickness of 1-3/8, how can i fit it with the existing bolt? A:you can use the 1/5 black shim we put in package for roller bolt, then your door will be fit perfectly. Q:Can i cut my rail to fit my space? A: Yes, Track can be cut into any length to meet your own require.