The Warp Drive Protractor is an economical device that accurately sets the pitch of your propeller blades to within 1/4 degree. It can also be used for a variety of other applications such as wing surfaces, flaps, tail sections or anything needing to be measured in degrees. The Warp Drive Protractor makes it easy to prepare the propeller for adjustment by: (1) setting the blades to horizontal, (2) set the hub to vertical, (3) and finally measure the blade pitch. And with the protractor locked in place on the blade, you can adjust the pitch to required standards. 1 lbs (0.5Kg) shipping weight.