If you have some basic tools, you should be able to remove your broken lock and replace it with a new one.

Yes you can. We try to keep IWP-45-92-25 gearboxes in stock. Ships out the same day

If you have a multipoint lock in your door, the machining has already been done.

That dreaded sound is a sign that there are broken parts inside the lock body gear box.

The internal “Return Spring” is worn out and will not lift the lever handle back up to it’s rest position.

That would the worn out teeth on the cog that shifts the drive rail inside.

Internal lock parts are not sold separately, You must replace the entire lock body or gearbox.

You may not have the linkage between the lock drive rail and the extension transfer bar connect properly.

Twice a year should be fine. Use a different lubricant though. Like Super Slick Stuff found at Lowe’s

That is the measurement from the multipoint lock faceplate to the center of the handle.

It is an added latch on the edge of the door that helps prevent lock activation in the opened position.

Yes,  Caradco 4101341 multipoint door locks

Yes,  These ship out in a few days and direct to your shipping address.