【Precision Graduation Design】Fine-scale markings ensuring accurate measurements, handling both geometric drafting and everyday tasks 【High-Strength Aluminium Alloy】Crafted from premium aluminium alloy, exceptionally durability and resistance to deformation 【Safety Rounded Edges Craftsmanship】Each ruler features rounded corners to the risk of cuts from sharped edges 【Multi-Functional Combo Set】Includes four tools such as rulers and set squares to meet measurement requirements 【Lightweight and Portable】Compact design easy carrying, ready for any learning task at a moment ' s notice, Manufacturer: GMBYLBY