Where can I buy a steel ruler?

In daily life, steel rulers are widely used in hardware stores, whether as tools for students, carpentry, office and so on. , is an essential electrical appliance. In the fields of engineering, architecture, design and drawing, steel rulers can be used to assist in drawing plans, three-dimensional plans and schematic diagrams. Steel straightedge has the characteristics of firmness and accuracy, and can be used as a tool for cutting, trimming and calibration. So all hardware stores sell steel rulers.