Almost everyone used a square to scratch or pencil right-angle lines on a wood surface, or to try the swaureness of round edges, and the Dominys were no exception. Wood squares became unreliable after long use, and craftsmen often purchased combination wood and steel squares in the nineteenth century. What the square is to right angles, the bevel square is to any departure from 0 to 180 degrees. When the thick stock, or handle, is set against an edge, the blade may be moved to any angle desired and a line scratched or drawn across the wood surface. Its greatest advantage lies in its movable blade: a bevel can be used to duplicate any angle already cut into a piece of wood.