The Tooltech Multi-Angle 8" Marking Ruler is made of durable aluminium and 2CR13 stainless steel, with precision-etched metric and inch measurements on both sides. With a thickness of 1.7mm and a width of 25mm, this ruler can measure all angles in both forward and reverse directions. It also features a small hole for hanging and a magnet for easy storage. Perfect for precise measurements in both inches and centimeters.