MATERIAL - Made of 100% Premium quality stainless steel to Prevent Rust & Corrosion, heavy duty and non-bendable. Stainless steel material for your long lasting use. SAFETY EDGE - 0.9 mm thickness avoid sharp edges. SMOOTH DESIGN - End sides are smooth with no burr; One end is square, the other is rounded with a hole to make it easy for hanging, convenient storage. GREAT TOOL - Perfect for school or office Perfect for school and training class, paper piecing, craft work. Suitable for carpenter, engineering, architects, handy to use as drawing straight edge or measuring device. 5 X 6" STAINLESS STEEL RULE METAL SET ENGINEERS MEASURING RULER HAND TOOL 150MM