I have a townhouse unit with a very old door knob / deadbolt set that I want to replace because the key doesn't fit well and you have to know how to "jiggle" it in order to get the door to unlock. ...
Some time ago I closed my front door (rather forcefully) while the deadbolt was sticking out partially. This loosened the deadbolt, and the top screw no longer held. In addition, it cracked the door ...