The main parts of a door lock are the cylinder, bolt, box and strike plate. It’s useful for any DIY-er to know how things around the home operate. Understanding the different parts that work together to make a door handle and lock work, can help you fix minor problems on your own.
Doors sit in a frame that has five main components. The hinge jamb is the side of frame where the door is attached with hinges, the head jamb frames the top of the door, the strike jamb is where the door closes, and the threshold (optional) stretches across the bottom of the door.
