Its water resistant and scratch proof construction ensures durability, making it a efficient tool for both professional and casual users accuracy measurement with the Miniature Folding Ruler Keychain, featuring a design that unfold to 50cm, perfect for quick and accurate measurements Crafted from, this lightweight ruler boasts a 10 fold design with clear metric scale for various measurement needs Perfect for home renovations, outdoor activity, and measurements, this folding ruler adapts to various scenario Ideal for engineers, designers, craft enthusiasts, and anyone requiring measurements in their daily tasks