Durable Protractor The stainless steel digital protractor, laser-etched measurements provide clear reading. The digital LCD display is easy to read and eliminates guesswork High Accuracy The accuracy of this angle finder is ±0.3 degrees. Measuring range: 0-360°, folded length: 8 inches/200 mm, total length: 15 inches/400 mm Hold Data & Reverse Reading You can save data during measurement by pressing "HOLD / Rev."; The display can be reversed for easy reading by long pressing "HOLD / Rev." Combination of 2 functions Combination of ruler and protractor for easy measurement, you can measure lengths and angles Note The stainless steel edge is sharp. Be careful when using and keep away from children