Features: 2 in 1 functions ruler: This digital ruler can be used to measure the length and also can be used to measure the angle, it the combination of the two functions, you don\'t need to buy a lot of different functions rulers. Large LCD display Screen: With the large display screen, more convenient for you to observe, rotate the on one side of the ruler then it immediately displays the value. It is more convenient to use. (Note: Remove the protect film of the display screen before use.) Ze-ro button: Press the Ze-ro button at any time to return the display value to ZE-RO. It is easy to measure relative angles. 360 measurementhold function: This ruler allows a full 360 to measurement inside, outside and reverse angles. With the hold function for you to storage the measured angle. Wide applications: This ruler can be used for construction and repairing of stairs, the cutting of tiles, floors, and substrates, are also the tools often used by plumbers, carpenters, and builders.