360 free rotation. You only need to paste the universal wheel at the bottom of the box, then this heavy box can easily and steadily move in any direction, saving time and effort. Load-bearing capacityThe single wheel can withstand 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 installYou only need to use the self-locking device that comes with it. You just need to stick the casters 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 applicationThe casters are suitable for trash cans, storage boxes, small furniture, laptops, machines or other objects that need to be moved more easily. Quality and safetySmall casters are made of ABS material. Mini casters are made of ABS and stainless steel materials to ensure that they are strong, quiet and smooth, easy to roll, non-toxic and odorless. Please noteSince the bearing is made of metal, it may rust if placed in a humid location and cause the performance of the product to decrease. Please pay attention to cleaning up the water stains around the product in time and keeping it dry.