Now you need to drill a series of holes through the frame pieces. We want the holes to be equally spaced and to simplify this process, we will use a basic drilling jig. To make the jig, place one piece of flat scrap wood onto your drill press table. Clamp another straight piece on top of the first. This second piece will serve as a fence and its position is based on the thickness of your frame pieces. Measure the thickness of your frame pieces and place the fence half of this dimension behind the centerline of a drill bit in the chuck. So, since our frame pieces are 7/8" (22m) thick we clamped the fence 7/16" (11mm) away from the centerline of the drill bit. Essentially, this ensures that you will be drilling in the center of your frame pieces.

Next you need to drill one hole in the end of each of the four frame pieces. Use a drill bit that will allow the string to be thread through it. This first hole should be twice the width of the frame pieces away from the ends. Our frame pieces are 1 3/4" (44mm) wide so we made the first hole 3 1/2" (88mm) away from the end. You can clamp a temporary stop block on the drilling jig to ensure that these holes are equally spaced from the ends on all four pieces. After making the four holes, remove the stop block.