Cast iron try square
The cast iron tries a square is a tool for verticality inspection of machine tools, mechanical equipment, and parts. It is also an important measuring tool in the machinery industry. It is characterized by high precision, good stability, and easy maintenance.
A traditional try square has a broad blade made of steel that is riveted to a wooden handle or 'stock'. The inside of the wooden stock usually has a brass strip fixed to it to reduce wear. Some blades also have graduations for measurement. Modern try squares may be all-metal, with stocks that are either die-cast or extruded.'Try square' is so-called because it is used to "try" the squareness.