If you are struggling to open the door or your building hardware manufacturer is opening too fast or slow, then it may be... moreIf you are struggling to open the door or your building hardware manufacturer is opening too fast or slow, then it may be time to adjust your door closer. As long as you have the right tool for your closer (screwdriver, hex key, or small wrench) and a little time to check your work as you go, these six steps can help you successfully adjust most door closers.