Review on Efficient Universal Joint Coupling Connector: 0.5in x 0.9in x 2in by Richard Edwar

Inside diameter is not 0.5" and the included set screws are not even the right size. They fall right through the threaded hole. Overall fit and finish is poor. It was hand built with additional Hammet marks. This is a $5 part that is selling for almost $18 at the time of purchase. Stay away. It's garbage