Mortise lock LOB 447L CP — LOB brand mortise door lock, model 447L, polished chrome finish

LOB mortise lock model 447L in polished chrome (CP) is a mechanical mortise lock designed for secure latching and locking of interior and exterior doors. The lock fits standard mortise cutouts and is compatible with common handle sets and profile cylinders. Constructed for day‑to‑day mechanical operation, the unit is suitable for replacement of existing mortise locks or for new installations where a polished chrome finish and reliable function are required.

Advantages

The lock offers a polished chrome finish that provides a corrosion‑resistant surface and a uniform visual appearance on door edges. Its mechanical design emphasizes reliable latch and deadbolt operation with compatible handles and cylinders, enabling straightforward installation and consistent performance in residential and commercial settings. The mechanism is suitable for frequent use and allows standard maintenance such as lubrication and adjustment.

Suitable for

• Interior doors in homes and offices requiring a mortise lock
• Exterior doors with compatible cylinder and handle sets
• Replacement of standard mortise locks in residential or commercial doors
• Installations where a polished chrome appearance is desired

Key specifications

• Lock type: mortise lock for doors
• Finish: polished chrome (CP)
• Compatibility: fits standard mortise cutouts; works with compatible handles and profile cylinders
• Operation: mechanical latch and locking function for daily use
• Application: suitable for interior and exterior doors depending on cylinder/handle choice

How to use

Install the mortise lock into a matching mortise cutout in the door edge following manufacturer drilling and depth recommendations. Fit the lock body into the cavity, secure with screws through the faceplate, and attach compatible handle set and profile cylinder. Adjust strike plate position on the frame to ensure smooth latch engagement and correct bolt alignment. Verify operation by operating the handle and cylinder to confirm smooth retraction and extension of the latch and deadbolt.

Usage recommendations

Use compatible hardware: select handles, cylinders and strike plates that match the lock’s dimensions and intended security level. Periodically check and lubricate moving parts with a dry graphite or light machine oil suitable for locks, and tighten any mounting screws as needed to maintain correct alignment.