【With A V-Groove】The digital inclinometer has a magnetic base with a V-groove, so you can quickly and easily attach saw tables, band saws, metal bars and even round pipes.measurement(° degrees /% / mm / m / IN / FT) 【VA LCD Display】The digital inclinometer makes it easier and clearer to read the values even at night because the improved LCD display works with new black and white characters.Additionally, the digital inclinometer with low battery indicates. 【Automatic Reversing】High precision level bubble vial on top, for battery-free leveling work.The display was automatically inverted when the head is down. 【Zero and Hold Functions】 Allows precise measurement of absolute AND relative angles, bevels and slopes on every surface imaginable. carpenter's square angle measurer electronic level electronic digital level