Johnson Level & Tool 1888-1900 19-Inch Digital Angle Locator and Ruler Digitally displays in degrees Stainless steel scale in 1/32nd and mm Easy two button operation Zero button sets any point to zero Lock function enables the blades to lock at any angle 1 Year Warranty: Johnson Level warrants this product against defects in material and workmanship for one year after the confirmed purchase date. At its option, the company will replace or repair the product if it fails under normal use.