Determine angles as well as radial and linear measurements with the easy-to-read markings on this Quill clear plastic protractor. Calculate easily with this protractor that has a see-through quality to align on papers and diagrams. This Quill protractor has a sturdy plastic construction for durability and does not corrode after exposure to outdoor elements. Clear protractor is perfect support for educational and creative activities. 180 degrees and 6 imperial scale ruler. Dimensions: 4.38W x 8.13L. Made of transparent and durable plastic with easy-to-read numbers. Effortlessly allows to measure angles from both sides.