This floor guide are made of carbon steel which ensures high level performance for your sliding barn door. Two point screws slots design provide a secure lock to prevent the door from swinging to the sides. To ensure a successful installation, please check the space between door and wall before purchase. Features - Color: Black. - Material: Carbon steel. - Size: 12.00X6.50X4.00cm/4.72X2.55X1.57inch. - This width adjustable floor guide works for both pre-grooved and non-grooved door. - Unique bearing design ensure it work smooth and stable. - Please ensure the size are fit with the door you will install before purchasing. - Made out of material.Durable and reliable. Features a bright modern style. - This floor guide must be a for DIY your barn door, make it smoother. Package list: 2 x Barn Door Floor Guides