TOIMIOTOIM Bi-Folding Sliding Barn Door Hardware Kit,Heavy Duty Roller Track Kit for 4 Doors Top Mounted Package included Warning: NO DOOR PANEL INCLUDED. Package Included: Spliced rails, rail connectors, 4x door panel hangers, 6x door hinges, 2 rotating shaft, all hardware needed for bi-folding door. Instructions Installation. How to choose the style Distance between the top of the door and the ceiling > 5.2".Track length > Doorway width + 6".Single Door panel width > Doorway width/4 + 0.5". Door hangers size Adjustable screws suitable for door thinckness 1.2-1.7".The minimum distance from the top of the door to the ceiling is 5.2". How to install the rotating shaft How to locate the position of the rotating shaft: (width of the unfolded door panels - width of the door opening) /2 - 3/4" Package included Installation size door hanger size Rotating shaft Installation Easy Install it by Yourself Installation manual was included, contains detailed Measurement & Installation Methods with Illustrations of each step： Measure the height of your door panel and the space you need to reserve above and below.Etermine the location of the mounting rails and install the spliced rails.Install 3 hinges between the two door panels.The hangers should be installed along the edge of the door panel to ensure the door can be fully opened and closed.Drill holes in the bottom edge of the door panel on the non-sliding side to install the door rotating shaft.Measure and install the door rotating shaft on the floor.Insert the door shaft into the hole in the bottom of the door panel while installing the door hangers on the rail.Tighten the fastener on the door hanger on the non-sliding side. The installation is complete.If you need to install the handle, you are welcome to buy our modern handle, please search "B08YNRJYBB" on Amazon. Bi-folding Sliding Barn Door Hardware Kit for 2 Door Panels T Style Sliding Barn Door Hardware Kit Y Style Sliding Barn Door Hardware Kit J Style Sliding Barn Door Hardware Kit Sliding Barn Door Floor Guide Sliding Barn Door Handle Brand TOIMIOTOIM TOIMIOTOIM TOIMIOTOIM TOIMIOTOIM TOIMIOTOIM TOIMIOTOIM Size 3-9 feet 4-12 feet 4-12 feet 4-12 feet Fits 1/2"-2" Thickness Door Panel Fits 1 3/8” to 1 3/4” Thickness Door Panel