A recent project required drilling a large number of holes 3⁄8" from the edge of a workpiece.

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A recent project required drilling a large number of holes 38 " from the edge of a workpiece. It wasn't possible to use a drill press and fence to drill the holes, so I pondered a quick and accurate way to mark a line that distance from the edge for locating hand-drilled holes. Then I built the guide shown from scraps of 38 "-thick wood and 14 " hardboard. It worked so well, I made a set for other common dimensions.
—Len Urban, Rancho Mirage, Calif.