This protractor is very convenient to use. I took it to the carpenter's place to check the accuracy and it was within error. My square is quite old so it might be a bit off anyway. I like that the ruler is marked not only in millimeters but also in 1/16 and 1/32 of an inch. I also like that it's made of stainless steel and not plastic or painted metal.
Portable Handheld Manometer π for Accurate Pressure Differential Measurement
5 Review
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review
π Enhanced Precision with Backlit Professional Manometer for Differential Ventilation
6 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review