1. The square cubic rulers are made of PVC, durable, not easy to break for using a long time. Examination Ruler has no sharp edges, it's hard to scratch your hands.2. The percentage slide rule is lightweight so you can carry and store it with you every day. You can slip them into your pencil case, backpack, or even your pocket. The numbers on the rulers are clear, convenient to read, and easy to measure.3. The percent ruler is very beneficial for civil service examination or other examination calculations, and can also be used to measure, draw geometric figures, etc., providing you with great convenience, suitable for classrooms, offices, homes and other applications.
