Review on WINSINN Aluminum Synchronous Timing Printer Power Transmission Products by Brent Borseth

They worked great and appear to be of good quality. The only problem I had was that one of the socket head screws was not seated properly so the hex wrench would not work. I had to take my time unscrewing it with twisting pressure, but it eventually came out. Once I reversed the screw I was able to use an allen wrench and all was good. I'm assuming they use a machine or magnetic tool to insert the bolts since the allen wrench can't go in backwards like it used to.