CTA Tools 9030 Fluted Screw Extractor Set, 5-Piece Bolt, Stud or Screw Size: 1/4 to 5/16-Inch and Drill Size: 1/8-Inch Bolt, Stud or Screw Size: 3/8-Inch and Drill Size: 3/16-Inch Bolt, Stud or Screw Size: 7/16-Inch and Drill Size: 15/64-Inch and Pipe Size: 1/8-Inch Bolt, Stud or Screw Size: 1/2 to 9/16-Inch and DrillSize: 5/16-Inch and Pipe Size: 1/4-Inch Bolt, Stud or Screw Size: 5/8-Inch and Drill Size: 3/8-Inch and Pipe Size: 3/8-Inch