I ve tried millions of things to get a hole in the steel door.
How to install a chain lock on metal door.
Tape up the template for the lock plate.
This is the part that is not attached to the chain.
The locks consist of two sides the secured side where the chain is firmly bolted and permanently set then the sliding side where the knob at the other end of the chain can be inserted and slid into place.
Move the fixed peg portion on the door face where the swinging arm easily.
Position it about 3 to 6 inches above the deadbolt on your door.
For the door side screws with a length1 8 to1 4 shorter than the thickness of the doorwill give the most strength.
Adding a deadbolt lock can be a great way to improve the security of your steel door.
A door chain lock is an additional lock to the standard deadbolt and door handle locks that may already be on your door.
As da01 mentioned a good 12 volt drill should manage this just fine if you are using a drill bit designed for metal.
I have had metal doors on my last three houses and all were easy to drill.
If you do not have a deadbolt on the door place it about three to six inches above the door handle.
Position the lock with the swinging arm portion on the door frame near the edge with the arm extending over the door.