For damaged key extraction, auto locksmiths carefully get rid of pieces from locks and ignition cylinders
https://www.g28carkeys.co.uknpck746.nexorafield.com/posts/three-common-reasons-your-experienced-auto-locksmith-isn-t-performing-and-how-to-fix-it
For broken key extraction, auto locksmiths carefully eliminate pieces from locks and ignition cylinders. They reduce damage and then produce a replacement key that works properly.