Description 2 In 1 Protractor Ruler Setmeasure Both Length And Angles With An Accuracy Of 0.5 . This Digital Protractor Is Ideal For Woodwork, Home Craft, Diy Family Projects, Decoration, Etc. . 360 Degreesthe Angle Ruler Enables The Measurement Of The Inner And Outer Angle As Well As The Reverse Angle (Measuring Range: 0~360). Also Supports Measurement Between Metric (Mm) And Imperial (Inch). Long-Lasting Power Supplylithium Battery Operated, Large Capacity Standby And Auto Power Off Function, Can Work For More Than 5000 Hours, Save Power Consumption And Extend Battery Life. . High-Quality Materialhigh-Strength Nylon Glass Construction Material, Which Has Good Rigidity And Wear Resistance, Not Easy To Deform, Not Scratch Hands, And Lightweight. . Multifunctionalwith A Locking Button, You Can Easily Lock The Angle At Any Position. Compact, Accurately Measured, Easy To Read. There Are Also And Conversion Button, Data Hold, On/Off/Zero Buttons And Auto Power Off. .