4 in 1 digital protractor - Measure not only length, but also 360 angle (inside angle, outside angle). Locking Function Use locking screws to lock both legs in the desired position or desired angle. Large 1" LCD Display - This metal angle protractor with electronic LCD digital display, you can switch between degrees and minute with "/" button. "HOLD" button stores data during measurement, "ON/OFF/Zero" button resets data to zero by short press at any angle; angle lock button for each angle. Excellent quality The electronic angle protractor made of high quality forged stainless steel is laser engraved (scale in mm and in inches), resistant to abrasion and corrosion. The analog angle protractor on the protractor does not lose its color during use, and the scale remains clear even after a long time. This angle finder ruler can measure at the both angle and length, in metric and imperial scale. Woodworking: Adjusting angles of table saw, miter saw, band saw, etc. Construction Sketch, draw Convenience Quickly measure angles with 0 accuracy .3 degree. (0.3 degree means the measurement result may be larger or smaller than the actual angle by up to 0.3 degree. The total difference between two measurements can be up to 0.6 degrees). Easy operation with just two buttons. A good lock function allows you to lock the measurement at n any angle. Compact structure for convenient carrying and use. Number of products: 1 piece Color: silver + blue Size: 27.8X10.0x3.o(cm)