The doorlever pins from Intersteel are available in various sizes and designs. For example, you can choose between a pin with a saw cut, a solid pin or a pin where both sides are hollow. When assembling a doorlever, please note that if you are using a pin where both sides are hollow, you will be assembling the pin correctly. The lever pin is not equally thick on all sides, the thin side you use to screw in the Allen screw. When tightening, you will feel resistance, continue to turn until the Allen bolt is flush with the neck of the lever.