Won'T Scratch Easily: Made Of Premium Space Aluminum, It Won'T Scratch And Keep Your Spirit Level In Pristine Condition. High Accuracy: The Accuracy Of This Angle Finder Is 0.5 Degree. Measuring Range: 0-230, Total Length: 300Mm. With Automatic Stop Function And Hanging Hole. Durable ProtractorSturdy And Stable Work, Easy To Carry, Corrosion-Resistant Aluminum Alloy, Lcd Hd Display With Electronic Digital Display: Stable, Reliable And Accurate. Angle Protractor & Spirit LevelThis Tool Can Measure Both Angles And Levels (Note: This Is Not A Digital Spirit Level. Does Not Display The Number On The Lcd, But Only Help You Judge Whether It Is Horizontal Or Vertical Or Not High Quality Service- If You Have Any Questions About Using, Installation And Product, You Can Contact Customer Service At Any Time, We Will Solve The Problem Within 24 Hours, We Also Provide 18 Months Warranty.