Norton 1601 Replacement Body 689 Aluminum Finish

welcome back I'm Kevin Lakhan with Mitchell acoustical and today we're talking about commercial door closers we're here in the entry area of our office and today we're going to go with a concealed closure this happens to be a left-handed door and so we don't as soon as people come into our office area we don't want them seeing a closure on a door so we're gonna hide it to the inside of this frame here so that when it opens that's when it's exposed for this installation we'll be using a heavy-duty commercial door closure by universal hardware we'll have a link to the exact model and description so the first thing that we're gonna do is find our a and B points and what that is is that's the start of the center of the screw at the end of the center of the screw now in this particular closer it is 7 and 5/8 and then from there it's 9 and the 16th so that's just on this particular one a lot