Designed to be used with the Maker's Board, the Ruler and Gauge are also handy on their own! Each tool is magnetic, and can be stuck onto the Maker's Board or any metal surface for measurements and keeping your place in intricate patterns! The Ruler is marked in inches and centimeters. The Needle Gauge is designed for measuring knitting needles, but can also be used as a straight edge for tracking patterns and charts. Plastic free, each tool is made with 100% biodegradable plant fiber.