Features: 1.2-in-1 Electronic Ruler. The protractor angle finder has the function of steel ruler and angle measuring tool. Digital stainless steel ruler and protractor combination for easy measuring. 2.Locking Function. For read easily, this scale ruler can be locked at any angle. It comes with a reverse fucntion button, when you measuring large angle and doing reverse measurement, the display can read up-side-down. 3.360° and Hold Function. Hinge, mechansim on the angle rule allows a full 360° to measure inside/outsid reverse angles. With hold function to store measured angle in memory and zeroing button to reset angle finder tool each for time. 4.Clear and Accurate. Accuracy of this ruler is ±0.2°. Folded length 220mm, total length 400mm. This stainless steel protractor angle finder features laser-etched metric and imperial measurements on ruler edge, come with LCD display for reading. 5.Wide Applications. Double as both a digital angle gauge and protractor for measuring all your workship angles, such as cheching angle of blades on table saw or accuracy of miter saw, making angle cuts or measurements, etc. Specifications: Material: Stainless Steel Adjustable Angle:0-360° Accuracy: ± 0.3 Degree Measuring Range: 0-300mm/0-12inch Type: 200mm; 300mm Total Length:Approx. 400mm Color: Silver Weight: 243g Package Includes: 1 Piece Electronic Ruler note: 1.Please allow 1-2cm errors due to manual measurement. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.