Mm scale on one side, inch on the other 1m 2m Wood A classic thumb stick made of glass birch with Swedish steel joints, allowing for thin sticks and a smooth meter stick. Graduation with black numbers on both sides, metric mm. -Protective lacquered with water-based lacquer for increased resistance to dirt and moisture. -The joints are heat treated, epoxy lacquered and oiled at three points to give them their high quality characteristics. -Each ruler is checked twice in production with a high-speed camera.