Using the Ox Pro Adjustable T Square is easy. First, adjust the sliding T-head to the desired angle. You can hold it hands-free thanks to the ABS end-caps with ledges. When marking and cutting, place the T-square along the board edge. Make sure to lock the strong screw lock tightly to keep the angle fixed. For maintenance, wipe it clean with a dry cloth after use. Store it in a dry place when folded. Avoid using it with sharp objects that could scratch the scale or the profile.