Although it is used for a box for carrying a power cable etc. of about 100 to 200 kg and so on, it has become easier to start after exchanging for this caster. I decided this manufacturer as emphasizing initial transmission, but it was a correct answer. The price feels high compared to a monotaro caster or an unnamed caster, but I think that it is cheap as a result, considering that smooth running lasts for a long time. Recently I purchase monotaro casters and other made in japan casters separately. Personally, it is a manufacturer recommended for carrying heavy objects.