A square tool can be used to mark cuts, measure angles, and check the squareness of edges. It has become a standard tool for carpenters, but it has many other uses as well. Both the combination and speed squares are used in carpentry and a few other related fields, and there are a couple of others that can be used for drywall and framing. Architects and engineers often use a drafting T-Square, which is a versatile and flexible tool that can be slid across a flat table. The handle will be made of either wood or plastic, while the blade can be moved in a way that the designer feels is necessary.