Check &transfer angle measurements &have a ready straight edge all in one tool. This compact 7" digital angle locator & ruler is made of durable stainless steel. The digital angle locator displays measurements digitally in degrees on an easy-to-read LCD display. The digital angle finder also features easy two-button operation, including a zero function that lets you set any angle as your zero point. The 7" ruler portion of this tool includes a scale in 1/32's of an inch &in millimeters. The lock function allows you to easily lock the blades at any angle, which is useful when transferring angles.Includes: 1 3V CR2032 lithium battery.