Combination Square

A combination square is a versatile measuring tool used in woodworking, metalworking, and other precision tasks. It typically consists of a ruler with a sliding adjustable square head that can be locked at different angles along the length of the ruler. The square head can be used as a 90-degree square for checking or marking right angles, or it can be positioned at other angles to measure and mark various angles accurately. The ruler often has markings in both imperial and metric units, providing flexibility for different measurement systems. Additionally, combination squares may have a level bubble for ensuring horizontal or vertical alignment.