The countersunk mounting holes were not deep enough. The flat head screws protruded approximately .025" when tightened. This would not allow the rear wheel to mount squarely. Lucky for me I have a Bridgeport and I sunk the holes .030" deeper. The average person may not realize this problem and mount the wheel over the protruding screws causing an unsafe condition ( wheel would possibly wobble ) Other than that the product is good value and quality.