Size stamped on extractor refers to drill bit size to be used with that extractor. Use tap holder or wrench on extractor to turn out broken part. 5 Piece Screw Extractor Set. 0.28-lbs Weight, Made in USA.

Brand: Proto
Type: Screw Extractor
Number of Pieces: 5
Manufacturer Part Number: J9500A
Set or Single Item: Set
Country/Region of Manufacture: United States