【Durable Protractor】Stainless steel digital angle, laser-etched measurements provide clear reading. The digital LCD display is easy to read and eliminates any guesswork. 【Hold Data & Reverse Measurement Value】You can save the data during measurement by pressing "HOLD/Rev."; The display can be reversed for easy reading by long pressing "HOLD/Rev." 【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