Bore should be 5/8 inch. Instead of a hole, there was a whopping 1 mm for a small one. In addition, the keyway was too small in both width and depth. Now a kicker, the keyway has been cut down the middle, leaving one side lower than the other. I saved the best for last, the length of the keyway was cut diagonally to a square. How does someone do that? In the end it's pure crap. Well to be fair it might just be my bad luck but everything else is fine. Much luck!