【Durable Protractor】 The stainless steel digital angle finder and laser-engraved measurements provide a clear reading. The digital LCD screen is easy to read and eliminates guesswork. 【High Accuracy】 This angle finder has an accuracy of ±0.3 degrees. Measuring range: 0-360°, folded length: 8 inches / 200 mm, total length: 15 inches / 400 mm 【Retain Data and Reverse Measurement Value】 You can save the data during measurement by pressing "HOLD / Rev."; the display can be reversed for easy reading by pressing and holding "HOLD / Rev." press 【2-Function Combination】 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