If you manage a cluster mailbox unit or just need to replace a worn-out lock on your USPS-approved neighborhood box, this L-1172C compatible lock is a direct fit.

It's designed to replace CompX National C9100 locks and works with those exterior pedestal-mounted boxes you see in apartment complexes or subdivisions.

The cylinder is a 5-pin tumbler type with keyed-different security, meaning your keys won't open anyone else's box – always a good thing.

It rotates 90 degrees clockwise to lock and unlock, and the kit comes with five different cams, so you can match the right configuration for your specific mailbox model.

Also in the box: a mounting nut, a spring clip, and three keys.

Installation is pretty straightforward – there are plenty of YouTube guides that walk you through it, but definitely throw on some gloves because those metal edges can be sharp.

The construction is solid, tested to OEM specs, so it should hold up to weather and daily use.

Whether you're a property manager or a homeowner dealing with a broken lock, this kit saves you a call to a locksmith.