I bought it because I wanted the stainless steel shelf movable in MUJO good room unit in the room so that I could use the room more flexibly. The female screw of the shelf's leg is M8, so you can move it by changing it to various casters, but the uncollateral original casters are not too heavy loading and can not be used for large shelves (although you can install them). Therefore, looking for a caster with screws with the largest load capacity as M8 seems like this, 100 daN * 4 pieces * 60% (margin) = 240 daN, it is OK until about 240 kg. On the other hand, even though considering loading various shelves on the shelf and shelves, it will not exceed 240 kg, but since the total weight exceeds 100 kg so much, it is not overspecific and I think that it is a product with just good performance. Although it is not cheap, I am grateful for the interface that is easy to see and easy to see.