Cal-Royal CAL-ROYAL SC Series SC8480 Heavy Duty Mortise Lock is a high-security lock designed for commercial and residential use. It features a heavy-duty construction, a reversible latchbolt for left or right-handed doors, and a variety of trim options to match your décor. The lock is easy to install and comes with all the necessary hardware. It is perfect for use on exterior doors, interior doors, and even storerooms.