PENGZHAN Folding Frame Triangle Ruler ?Accurate Scale?: Precision-etched scales on this drywall triangle ruler give accurate 90 degrees and 45 degrees readings. ?Foldable?: The ruler 48-inch framing square can be tri-folded paver, and we give away a storage bag, which is more convenient to use. ?Easy to Read?: Our square has imperial scale units on one side and metric scale units on the other. Easy to read markings with black on silver design. ?High sturdiness and rust-free?:Carpenter square constructed of high quality aluminum alloy, improving this product's drability, density, and corrosion resistance. The foldable aluminum alloy angle ruler body is thickened, and the rivet triangular reinforcement is not easy to break. ?Scope of application?: Ideal for carpentry applications in framing, roofing, stair work, in making layouts and patterns - can also be used as straightedge for determining flatness of a surface, useful for determining and marking angles and making square cuts on boards.Christmas measurement goodies for home