Hillman 852104 Barn Door Roller, Zinc Finish

Barn door rollers are to prevent the wind from catching barn doors. Designed for heavy-duty applications. Extreme wind can blow barn doors outward and cause damage to the doors and other essential parts. Rollers are adjustable to doors that are 1 to 3-3/4 in thick. Mounting holes are 5/16 in Dia for installation purposes.