Taytools 500 mm 20" 2 in 1 Digital Protractor Digital Goniometer Digital Angle Finder Ruler with Stainless Steel Blades 114115

20 inch 500 mm digital protractor with rule 2 in 1. This super handy and precise digital protractor is perfect for making ultra-precise angled measurements and project layouts. It has the following features: 1) 1.375 inch wide by 20 inch long stainless steel blades with photo etched graduations in mm and quick reading 32nds 2) Closed length 20.4 inches, full open length 39.3 inches 3) Zero function allow setting of zero at any angle point 4) Display reads continuously as arms are adjusted 5) Measures both inside and outside angle measurements 6) Large clear LCD display 7) Strong blade lock holds securely for transfer of measurements 8) Measuring range: 0-360 degrees 9) Powers off after 5 minutes of nonuse 10) Resolution: 0.1 degree 11) Accuracy: +/- 0.3 degree 12) Repeatability +/- 0/1 degree 13) Battery: 3V CR2032 with approximately 5000 hours of continuous use