Floor protection: It is wrapped with a soft polyurethane material to ensure that there are no scratches or marks on the floor, and it is easy to move. Safety - Five horizontal mounting holes are used to fix the guide rail and are not easily deformed. The angle is enlarged to make the mounting plate more stable. Intimate L-shaped design mounting plate to save space and easy to install. The newly upgraded five fixing holes fix the guide rail in the horizontal direction and are not easily deformed. The corners are reinforced to make the mounting plate more stable. Robust and durable - Each wheel is equipped with high-quality ball bearings. High load capacity: The load capacity of each wheel is 10 kg. Many possible uses: Usually used for small projects and movable furniture, including dressing tables, drawers, under-bed storage, shoe cabinets, toy boxes, cabinets, bookshelves, easels, etc.