It is very easy to use because there is no need to make set screws yourself. I just do not know why there is a screw in the place where 90 degrees deviation. I will purchase again because there is no need to open screw holes.
Because it can be screwed, it can be fixed to any kind of shaft and easy to use. Variety of teeth number is abundant and design range widens. Since burrs remained inside the through hole of the screwing stopper, it felt that it would be good to carry out polite deburring treatment. It is somewhat expensive compared to the company.