Stanley J9500B Proto 10 Piece Screw Extractor Set 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. 10 Piece Screw Extractor Set 4.50-lbs Weight Proto 10 Piece Screw Extractor Set Includes the following items: J9521, J9522, J9523, J9524, J9525, J9525B, J9526, J9527, J9528, J9529.