2 in 1 Digital Protractor - Measure not only length, but also 360 angle (inner angle, outer angle). Locking Feature Use locking screws to lock both legs in your desired position or angle. 1" Large LCD Display - LCD with electronic 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 pressing any angle; angle lock button for each angle. Length, width and precision Length measurement: 400mm; 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, which ensures quality, corrosion resistance and durability. Excellent quality - The scale is forged from premium stainless steel and is laser engraved ( mm and inch scale), abrasion and corrosion resistant. Multi-function This angle finder ruler can measure both angle and length, in both metric and imperial. Woodworking: adjusting angles of table saw, miter saw, band saw, etc. Easy to use with only two buttons. Good locking function allows measurement to be locked at any angle. Compact structure for convenient carrying and use. The rulers of this digital angle finder are made of durable brushed stainless steel. The viewfinder angle ruler can be used in various fields instead of angle ruler, straight ruler or square ruler etc. Easily draw lines with the stainless steel rulers. Stainless Steel Angle Ruler Technical description and operation Measurement range: 0~999.9 (must be calibrated before each use) Accuracy: 0.3(0.3 degree means the measurement result may be higher or lower than the actual angle by max 0.3 degree. The total difference between two measurements can be up to 0.6 degrees). Ruler measurement range: 0~400mm; 0~7 inch 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 burning marks on wood. It is dangerous for children. Please keep it away from children. The CR2032 button battery powers the product. It's easy to find at your local store or online. Note: Due to the light and screen setting difference, the product color may be slightly different from the picture. As manual measurement is different, please allow slight size difference. Shipping Quantity: 1pcs