360° Free Rotation: You only need to paste these sliders at the bottom of the box, then this heavy box can easily and steadily move in any direction, saving time and effort Load-bearing Capacity: Four single bearing wheels together provide a maximum load capacity of 20 pounds. You can add more wheels as needed. Not recommended for use on white quartz countertops Easy to install: You just need to stick these appliance sliders to the bottom of the object with the included self-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 Application: The casters are suitable for trash cans, storage boxes, small furniture, laptops, machines or other objects that need to be moved more easily Quality and Safety: Mini casters are made of ABS material. Mini casters are made of ABS and metal materials to ensure that they are strong, quiet and smooth, easy to roll, non-toxic and odorless