Proto J9500B 10 Piece Screw Extractor Set
https://www.sawab.app/shop/j9500b-proto-j9500b-10-piece-screw-extractor-set-1171
https://www.sawab.app/web/image/product.template/1171/image_1920?unique=48219da
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Drive into end of broken pipe or fitting.Use tap holder or wrench on extractor to turn out broken part.Size stamped on extractor refers to drill bit size to be used with that extractor.