At work we needed to use a jig which aligned to the corner of a box. Our method of holding two flat pieces to keep the jig straight was... less than optimal for a two armed creature. Because of this I whipped up two jigs. One is just a 90 degree corner and the other is the same but with a large "face"? attached to it so the jig can be held down and aligned with one hand. Helpful for anyone in need of a quick and cheap alignment tool.