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 angle. Large 1'' LCD screen. - This metal angle protractor with electronic LCD digital display, you can switch between degrees and minutes with the '/' 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. Length, width and accuracy Length measurement: 400 mm; Measuring angle: 000.0~999.9; precision ; 0.3; resolution: 0.1; Measuring range: 0-360. The body of the ruler is forged from high-quality stainless steel, which ensures quality, corrosion resistance and durability. Excellent quality The electronic protractor made of stainless steel High quality forged is laser engraved (mm and inch scale), resistant to abrasion and corrosion. The analog protractor on the protractor does not lose its color during use, and the scale remains clear even after a long time. < p>Quickly measure angles with an accuracy of 0.3 degrees. (0.3 degree means the measurement result may be higher or lower than the actual angle by up to 0.3 degree. The total difference between two measurements may be up to 0.6 degree) . Easy operation with just two buttons. Good locking function allows measurement to be locked at any angle. Compact structure for convenient carrying and use. Accessibility 1.The rulers of this digital angle finder are made of durable brushed stainless steel . 2.The angle finder can be used in various fields instead of an angle ruler, a straight ruler or a square ruler, etc. 3. Easily draw lines with the stainless steel rulers. Stainless Angle Ruler Technical description and operation Measuring range: 0 ~ 999.9 (must be calibrated before each use) Resolution: 0.1 Folded length: 220 mm Accuracy: 0.3 (0.3 degrees means the measurement result may be larger or smaller than the actual angle by up to 0.3 degrees. The total difference between two measurements may be up to 0.6 degree). Extended length: 400mm Ruler measuring range: 0 ~ 400mm; 0 ~ 7 inches Measurement: laser engraving Working temperature: 0 ~ 50C. Battery: CR2032 3V lithium batteryno Thanks to the screw, the rulers could be held at any angle. 1.Please hold the ruler when turning the screw. Turn clockwise to tighten; turn counterclockwise to loosen. Stainless steel edge is sharp for cutting papers and engraving marks on wood. 2 . It is dangerous for children. Please keep it out of reach of children. Color: silver Quantity sold: 1 piece