This digital protractor/rule allows you to precisely set and measure angles in 0.05 degree increments. The stainless steel arms are graduated inch and metric scale for convenient and immediate linear measuring. Features a hold function, ensuring you never lose your reading, and a reverse reading capability for those hard to calculate angles. The protractor measures angles from 0 to a full 360 Degrees. Packaged in a protective plastic pouch with an extra battery.