Review on 🔍 Enhancing Precision: Starrett 449AZ 3R Micrometer Graduation Accuracy Unleashed by Jon Manning

I bought this for gunsmithing applications. The non-rotating blade is ideal for measuring barrel shoulder depth from the breech. The spatula can be manually rotated to the correct position and "not rotated" meaning the spatula will not rotate during microphone measurement; The blade will not "stick out" of the shoulder.