Mayes 10231 Squangle, 0.001 in Graduation, Aluminum, 13-1/2 in L, 6.9 in W

The Mayes� 10-in-1 squangle is the world's only 10-in-1 tool that incorporates all the features of a square, rafter square, protractor, level, T-square, sight plumb, straight edge, layout jig, pitch finder and ruler. Thumbscrews tighten for angles of 45 to 90 deg and the level vial is virtually unbreakable. The squangle comes with instructions.