Review on Enhanced Performance of Medium Duty Aluminum Turntable with Single Row Bearings by Curtis Donjuan

Smooth rotation - instead of a ring on top of another ring with a ball bearing in between, this Lazy Susan is based on an inner and an outer ring, both of equal thickness. So in order not to interfere with each other, the rings have six plastic knobs in opposite directions to keep what you want to rotate off the base, table or whatever you want to put on it. I don't see how easy it is to connect (screw) one of the rings to the base or object you want to rotate. Three white buttons would need to be knocked out, and then the inner ring could be attached to something. So I didn't realize that when I bought it. If you never have to move the object you want to rotate, I think the weight of that object will hold everything in place. But if it ever needs to be moved, the ring needs to be attached to the object.