Weld-on hinges, also known as barrel hinges and lift-off hinges, provide a strong, compact, and attractive method of attaching metal doors to metal frames for electrical, agricultural, security, safe, tool cabinets, gate, enclosure, and many other industrial applications. Weld-on barrel hinges can be used both in lift-off door applications (hinges are both aligned with the pins pointing in the same direction) or non-removable door applications (hinges are aligned with pins point toward one another)