It is purchase with repeat. The price is also cheap, the quality itself is not problematic, though. However, among the items I bought this time, there was one screw bent so badly that I had a hard time installing it. It is a bit disappointing. So, although it is originally four stars, this time it is two stars.
Since the bearings of the board (daughter) which carries the motorcycle move is rattled when the ground is rattled, it is impossible for usual things to happen, so we built and modified tapered roller bearing bearings. At that time, I was looking for a circular one that pressed the moving part of the bearing against the plate, but I found this product and tried it. The tapered roller bearing bearings were at hand, and the size was perfect as we chose the item while measuring its diameter. If you tighten with bolts, the peripheral fold spreading in the Z axis direction will collapse, but it will be strong enough to hit the board and it will be enough slip prevention. I wonder if the inside protuberance of the circle did not enter me? I cut it with a ruther and used it.