The application of cast iron bending plate is wide, not only cast iron plate bending is used to detect parts, but also it is used in machining fixture. Used to test 90 ° angle of the workpiece, test mutual verticality between part surfaces during equipment maintenance, also commonly used for bench marking. And commonly used to check the vertical machine tools in the testing, installation and inspection, check the verticality of the workpiece on a cast iron surface plate. It applies squareness checks between high-precision machinery and equipment.