The quality seems good enough but it's not the right size. I ordered 1/2 Int. x 1 1/8 outside. A trial mount with 1/2" shaft didn't fit. The inner size of the mics are 0.48 and 12mm respectively, the outer size is 29mm, not 1.125. Oddly enough, I also ordered 12mm x 29mm stock for another project. They showed it was the same bearing Hmmmm I have a lathe so I can get these millimeter bearings to work but it adds to the assembly time Someone without a lathe would have to make some serious sworn tooling Sorry Uxcell we machine , no carpentry. Proximity doesn't count here. A few thousandths is a big deal.