JEGS W80635 5-Piece Bolt Extractor Set Includes heavy-duty extractors for: 1/4", 5/16", 3/8", 7/16", and 1/2" bolts Extractor-Size Drill Bit Size #0 1/4" 9/64" #1 5/16" 15/64" #2 3/8" 25/64" #3 7/16" 15/32" #4 1/2" 35/64" ...