Great for measuring or transfering inside and outside anglesuse it for laying out framing or scribing trim for out-of-square corners. The aluminum legs of this sliding bevel rotate a full 360°, and can be fixed at any desired angle with the knurled steel locking nut. The nut actually locks a short third leg, or brace, so that the locked bevel has the rigidity of a triangular structure. Folds into itself for storage as a 1-3/16" x 1/2" x 20" package. Note: legs do not lie in the same plane.