General Tools 30 Flexible Ultra-Rule Protractor, 6-Inch Allows you to plot any angle with ease and absolute accuracy Micro-fine marking holes are positioned at 45, 30, 22.5, 5 and 0.5 degree intervals allowing you to place your mark with zero uncertainty Features four angle scales; Made of flexible stainless steel with etched black graduations Removable T-Bar and a rule graduated in 32nds Made in the USA