Calculated Industries 7455 is a versatile digital angle finder and ruler that provides precise angle measurements for a variety of applications. With an accuracy of +/-0.3° and a resolution of +/-0.1°, this tool is ideal for measuring both inside and outside angles ranging from 0° to 360°. The 7455 also includes a ruler function with measurements in both inches and millimeters, allowing you to easily measure lengths and distances.

To use the 7455 as an angle finder, simply place the closed ruler on a flat surface and press the "Zero" button to set the LCD readout to zero. Then, rotate one of the ruler blades clockwise or counterclockwise to measure the angle. The measurement will be displayed in the LCD window.