Commercial locksmith work covers the mechanical side of building security: lock hardware, master key systems, cylinders, door closers and exit hardware. It complements electronic access control, since an electric strike or magnetic lock still depends on a sound door, frame and latch, and a keyed override is often needed for service.
Electronic access control is often described as replacing keys. In practice the mechanical hardware stays, because a door still needs a latch, a closer and a way out.
Hardware beyond the key
A working opening depends on hinges, a closer, a latch and a frame that is square. Master keying decides who can still open a door when electronics are down or when a vendor needs in. Exit devices and panic hardware are mechanical life safety equipment, not accessories.
Mechanical and electronic together
An electric strike or a magnetic lock is only as good as the door it mounts on. A frame that flexes defeats a strike, and a closer that slams wears the hardware. Plan the mechanical work with the access control design, so the opening works both as a secured door and as an exit.