Feature: 1. ADJUSTABLE DESIGN The bottom is equipped with fully adjustable rollers to ensure safe sliding, good stability and not easy to shake. 2. EASY INSTALLATION With screw fittings, fix 2 screws on the floor bottom plate, adjust and tighten them to stabilize your barn door. 3. CARBON STEEL MATERIAL Selected high hardness carbon steel material, sturdy and durable, wear resistant and corrosion resistant. 4. SMOOTH BEARING Use one piece bearing to provide super smooth sliding. With a groove at the bottom of guide rail to protect floor from scratches. 5. HIGHLY COMPATIBLE It can be used with 3 inch thick doors. It has good compatibility and is suitable for all brands of barn doors. Specification: Item Type: Door Floor Guide Material: Carbon Steel Color: Black Weight: Approx. 422g / 14.9oz Product Size: Approx. 12x5x6cm / 4.7x2.0x2.4in. Package List: 1 x Floor Guide1 x Screw Accessory Kit (2 x Screw, 2 x Screw Tube, 2 x Fixed Width Screw, 1 x Long Screw, 3 x Sticker, 1 x Wrench)1 x Manual Note: 1. Please allow 0‑1 inch error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.