New, sharp bits. Threaded tap. Machine screws.

Call a locksmith, who has experience with this type of thing. I've got
20 years experience as a locksmith, and this isn't a dificult request.

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
..

wrote in message
ups.com...
How do I install a Metal Door check (like a doorchain) where the door
frame is metal? Are special screws required? Thanks