Durable ProtractorStainless steel digital angle, laser etched measurements provide clear reading. Digital LCD display is easy to read and takes the guesswork out of it High AccuracyThe accuracy of this angle finder is ±0.3 degree. Measuring range: 0-360°, folded length: 8 inch / 200 mm, total length: 15inch / 400mm Hold data and reverse measurement value You can save data during measurement by pressing "HOLD/Rev."; The display can be reversed for easy reading by long pressing "HOLD/Rev." press Combination of 2 functions Combination of a ruler and a protractor You can measure lengths and angles for easy measurement Note The stainless steel edge is sharp. Be careful when using it and keep it out of reach of children Material: stainless steel + overall length: 400 mm + measuring range: 0~360° Resolution: 0.05° + Accuracy: 0.3° + battery: 1 * CR2032 3V lithium battery (included) Package Content: 1*Digital Angle Finder + 1*User Manual Great locking feature: the tight/loose knob works well