CR053 - CNC machined square bearing holder. Fits in all chassis that take 1/4" square bushings.
Once (easily) soldered in place, the user can install any standard 3/16" OD, 3/32"axle ball bearing, or 3/32" or 1/8" axle, bushing, in this super-stout, carrier.
Note, the bore has to be opened up ever so slightly for 3/32" ball bearings.