TDC® Greenfield® Chicago-Latrobe® Screw Extractor, Size: #5, List Number: 800, 1/4" Small End Diameter, Large End Diameter: 7/16", 3-3/8" Overall Length, 1-1/2" Flute Length, Screw/Stud Size: 9/16 to 3/4", Drill Size: 17/64", 1/8" Pipe Size, Material: Alloy Steel, Finish: Bright, Applicable Materials: Alloy Steel, Tool Steel, Low and Medium Carbon Steel, Cast Iron