Finally an accurate way to set up all your control surface throws on your 3d models. The Twisted Hobbys Angle-O-Meter is one of the most important tools need to fine tune your models. Maximize and equal up and down throws, also correct for any differential issues as well. One of the unique features with the Angle-O-Meter is its designed to measure up to 70 degrees in each directions. Bold lettering always for easy to read while measuring.