The Gauge-It gives you a precise way to measure and set tablesaw blade angle and height. With the tool parallel to the saw blade, you can accurately adjust the blade to the exact height from 0" to 2-1/2" in 1/32" increments. To measure blade angle, turn the tool perpendicular to the blade, engage the spring and, again read the exact angle even while turning the blade angle crank on your saw. The saw gauge even compensates for the teeth of carbide blades, something that other tools and architect's triangles can't do. The tool is accurate to 1/2°, with a range of 0° to 45°. It can also measure router bit height, bandsaw table angle, and other machine setups.