Digital Angle Finder 7-Inch Protractor (200mm Stainless Steel Angle Finder Ruler) Ruler and protractor combination for easy measuring. Durable stainless steel body provide years' using. Total length 400mm. Accuracy ±0.3°; resolution 0.1°. Working temperature: -10 ?~+50? Quick and clear digital readout. Zeroing at any angle for relative measuring. Locking scr...