Features 1、Made of quality black carbon steel material, anti-deformation, anti-rust, sturdy and durable. 2、Suitable for sliding of warehouse door, easy to use. 3、Fine workmanship, smooth surface, will not scratch your door. 4、Prevent the door from swinging sideways. It is installed on the wall behind the door and does not require drilling in the floor. 5、This is a useful door accessory, keeps your barn doors safe. Suitable for door of thickness 76mm/2.99in. Features: 1.Made of quality black carbon steel material, anti-deformation, anti-rust, sturdy and durable. 2.Suitable for sliding of warehouse door, easy to use. 3.Fine workmanship, smooth surface, will not scratch your door. 4.Prevent the door from swinging sideways. It is installed on the wall behind the door and does not require drilling in the floor. 5.This is a useful door accessory, keeps your barn doors safe. Suitable for door of thickness 76mm/2.99in. Specifications: Material: carbon steel Weight: Approx. 422g Color: black Size: Approx. 123*50*65mm/4.8*2*2.6in Packing List: 1 * Guide Rail 1 Bag * Screws 1 * Screw cap 1*Guide wheel Package List