The DOUGLAS COMBINED PROTRACTOR & PARALLEL RULE is a must-have for any pilot or aviation enthusiast. Made in the United Kingdom, this high-quality tool is perfect for measuring and drawing precise angles and lines. The protractor and parallel rule combination make it easy to quickly and accurately draw parallel lines at any angle. With no warranty, this tool is built to last and is an essential addition to any aviation parts and accessories collection.     (A-19800)