PMC makes several different parts which are CNC machined or made in a lathe. They made quality products without them costing too much. We have many parts from PMC in stock as it just works and the price is right. Below you will find eg PMC coupling plates, we can only highly recommend mounting these. When fitting sintered metal couplings, be aware that the coupling becomes very hard (it grips quickly) This is not nice to drive with if it is a streetcar, therefore these couplings are often only used for motorsports or cars that are very hard pumped.