In not much more than an hour, a carpenter’s framing square can be converted to a jumbo-size cabinetmaker’s square. For the fence of the square, I used 1/8-in.-thick by 3/4-in. by 3/4-in. aluminum angle stock, available at most hardware stores. Cut the angle stock into a pair of 16-in. lengths. Align the angle stock so that it’s flush with the inside edge of the square, and clamp the three parts together. Drill holes for three Allen-head screws, then add the screws, lock-washers, and nuts. Drawings by Jim Richey. Drawings by Jim Richey.
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