Oria Screw Extractor, Damaged Screw Remover and Bolt Extractor, Set of 5 and Made from H.S.S. 4341#, with 62-63HRC Hardness, Easily Remove Stripped or Damaged Screws : Amazon.co.uk: DIY & Tools
How to Use a Screw Extractor: Remove Damaged Screws! | PTR