2 in 1 Digital Protractor - Can not only measure length, but also 360 angle (inside angle, outside angle). Locking function Use locking screws to lock the two feet in the position or the angle desired. ; Large 1 LCD Display - This metal protractor has an electronic LCD digital display, you can use the / button to switch between degrees and minutes HOLD to store data during measurement, ON/OFF/Zero Reset data Short press any angle to zero; angle lock button for each angle. Length, width and precision - length measurement: 200 mm; measuring angle: 000.0~999.9; precision ; 0.3; resolution: 0.1; measuring range: 0-360. The ruler body is forged from high quality stainless steel to ensure quality, corrosion resistance and durability. ; EXCELLENT QUALITY - The high quality forged stainless steel electronic protractor is laser engraved (mm and inch scales) for wear and corrosion resistance. The analog protractor on the protractor does not fade during use and the scale is still clear after a long time.