TDC® Greenfield® Chicago-Latrobe® Screw Extractor, Size: #1, List Number: 800, 1/16" Small End Diameter, Large End Diameter: 5/32", 2" Overall Length, 3/4" Flute Length, Screw/Stud Size: #8 to 1/4", Drill Size: 5/64", Material: Alloy Steel, Finish: Bright, Applicable Materials: Alloy Steel, Tool Steel, Low and Medium Carbon Steel, Cast Iron