A new addition to the tool shop: Bergeon Ref. 30209 screw extractor

Extracting broken screws can be a pain in the bum. Unless, of course, you have a 30209 in your tool box.  This is an absolutely brilliant tool - designed primarily for the extraction of medium to large watch screws. 

Price:  $165

https://shop.clockmaker.com.au/home/234-bergeon-screw-extractor-ref-30209.html

TIP: If you are not in a hurry, or need to remove steel screws too small to be 'clamped'- leave the brass plate in vinegar for a day or two. Vinegar will eat them away without leaving marks on brass plate or affect gold/nickel plating.