Anti-Slip Aluminum Rulers Set of 3 (6, 8 and 12 inch) Set of 3 aluminum rulers of 6, 8 and 12 inch. (15, 30, 45 cm). Width 35 mm / 1.4 inch Calibrated in milimeter and Inch Very durable, made from high quality anodized aluminum, ideal for use with cutter With anti-slip rubber to prevent slipping, and groove on top for better hold Aluminum is very hard and light. They will last a long long time.