National Hardware Satin Nickel Steel Barn Door Track Adapter is designed to connect multiple barn door hardware kits, making it i for use on door openings wider than 36 inches. This adapter is compatible with National Hardware interior barn door hardware kits, providing a seamless and sturdy solution for extending your barn door track. Crafted from durable steel with a satin nickel finish, it ensures both strength and style for your interior sliding door setup. Model Number: N187-003