It is an entry door. This weather stripping is made of metal. The portion on the door interlocks with the portion on the jamb.
It is broken at the bottom corner of the door and I am trying to identify it to find replacement.

It is an entry door. This weather stripping is made of metal. The portion on the door interlocks with the portion on the jamb.
It is broken at the bottom corner of the door and I am trying to identify it to find replacement.

What you have there is "interlocking metal casement", and for weatherproofing it is available as "interlocking metal weather stripping"