Installation Steps: 1. Remove the washer on the screw and insert it into the fixing hole 2. Gently screw the screw into the hole without tightening 3. Adjust the shelf to an appropriate length and tighten the screws 4. Tighten the knob clockwise until the shelf is tight 5. Installation is complete Specification: Product Name: Extendable Closet Shelf Material: stainless steel + plastic Color: White Dimensions: (30-40)x24/35cm, (38-55)x24/35/42cm, (50-80)x24/35cm Maximum load:2-17kg. Weight: 0.5-1kg Package Include: 1 pcs*Expandable Closet Tension Shelf Storage Rack Note: 1.Due to manual measurement, please allow a difference of 1-5g/1-2cm. 2.Due to different displays and different lighting, the picture may not reflect the actual color of the item. Thank you for your understanding.