The bamboo ruler surface is designed in cm size to help you create the most accurate lines and circles by adjusting them. It is very easy to use on the user plane to create clear corners, lines, and divisions. Besides, it is made from natural bamboo so it is extremely eco-friendly and durable.The ruler surface is designed in cm size to help you create the most accurate lines and circles by adjusting them. It is very easy to use on the user plane to create clear corners, lines, and divisions. Besides, it is made from natural bamboo so it is extremely eco-friendly and durable.