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