SIMPSON K Barn Door 36 in x 84 in Raw K frame Unfinished Knotty Alder Wood Single Barn Door Ratchet Sets Durable Construction: Features a steel Durable Construction: Features a steel housing for long lasting durability in industrial environments Lifetime ceramic disk cartridge The all wood core stile provides incredible strength and durability and all components in the core are finger jointed finger joints are superior joints as they have greater gluing surface for added strength The outer edge band blends with surface veneers so that the finger jointed core is not visible and the inner edge bands are provided so that no finger joints show in the sticking All stile and rail joints are secured using dowel pins and each fluted dowel is glued securely into the bore within both the stile and rail components ensuring a secure