Pocket Vernier Caliper: Dual scale reading, 2-piece gold vernier caliper made of high quality metal, sturdy and durable, no sharp corners, safe to use. High Accuracy: The brass ruler has millimeter and inch graduations, which are very accurate and make it a great measuring tool for daily use. This is a retro style mini ruler that looks great. Easy to Use: Lightweight and easy to carry, just put it in your bag, it will be a great measuring tool for your daily use. Vernier Ruler: Pocket Vernier Caliper. Over time, the copper will gradually oxidize to give a unique retro charm that is worth playing with. Versatility: The measuring tools are perfect for measuring small and delicate objects, measuring gemstones and other objects, and can also be used as bookmarks.