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 Ideal for engineers, designers, craft enthusiasts, and anyone requiring precise measurements in their daily tasks Its water resistant and scratch proof construction ensures durability, making it a efficient tool for both professional and casual users Perfect for home renovations, outdoor activity, and measurements, this folding ruler adapts to various scenario