Since the clocks we use are usually heavy, it is important to know how to hang them on a wall. The first step is to find an appropriate nail or screw and attach the clock using the head of the nail. Do not hammer nails into drywall unless you want your hands covered in plaster dust. Next, use two or three screws spaced out at about six-inch intervals and make sure that they are screwed in at a slant from the edge of the wall towards the center. The screws should be placed about 4 inches from the bottom of each clock. If a screw is too short, you can use a washer on top of it to raise it up.Hang clocks vertically or horizontally by hooking hooks into two or three nails on one side and two or three nails on the other side.