RAD 5 The bearings seem well made, I checked each one of them and they were all smooth turning with no wobble to them. Install was easy in a CW-01 chassis build (Unimog) and the fit was excellent.They are 100% better than the plastic bearings that come with the kit and for as cheap as they are if they last as long as the chassis then that is a win.Shipping was fast (Prime)