I used these on some RCLIONS wheels that I purchased online and they fit perfect. The 12mm hex could be a tad bit tighter as there is a little slop. Also note that these hubs use 4-40 screws and not metric if using them on Chinese knock-off wheels. It would be nice if the screws were included. It would also be helpful if they listed the length and not just that they come in 1/8" increments. Overall very happy with them