Inspect and measure hard to see items/text with Rothco's lightweight, flexible, and durable survival magnifying card & ruler. Easily store your magnifying card in your pocket, wallet, or pouch for on the go access to clearer vision. Made from a lightweight, flexible, and durable Fresnel lens to withstand any outdoor effects. CM’s and inches are printed along edges to double as a measuring system. Convenient size of most standard credit cards (3.25" x 2 1/8" and .4mm thick). Prepare your bug out bag with this essential survival tool.