【360° Free Rotation】. You just need to stick the universal wheel on the bottom of the box, then this heavy box can move easily and steadily in any direction, saving time and effort. 【Load Capacity】The single wheel can support a load capacity of 4.5 pounds. Four wheels together provide a maximum load capacity of 18 pounds. You can also add more wheels. 【Easy to Install】You just need to use the provided self-locking device. You just need to stick the casters to the bottom of the object with the included adhesive tape. No drilling is required and there is no damage to the object. It is recommended to wait 24 hours, it will stick more firmly. 【Wide range of applications】The casters are suitable for trash cans, storage boxes, small furniture, laptops, machines or other objects that need to be moved more 【Quality and safety】The small casters are made of ABS material. The mini casters are made of ABS and stainless steel to ensure that they are strong, quiet and smooth, easy to roll,