2-in-1: Digital Stainless Steel Ruler and Angle Finder - Easy Measurement of Inside and Outside Angles High Accuracy: 0.3 Accuracy - 360 Measurement of Inside, Outside, and Reverse Angles - Perfect for Woodworking and Crown Molding Locking Function: Convenient Lock and Reverse Angle Functions - Simplify and Your Work Digital Display: Exquisite LCD Display - Precise Angle and Length Measurement in One Tool Notices: Stainless Steel Edge - Caution During Use, Keep Away from Children - Minor Scratches on Rulers Possible Specifications: 0-300mm Color: As Shown Material: Stainless Steel Package Contents: 1 x Electronic digital angle ruler 1 x Button battery Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.