Superior Tool 05250 Bolt Extractor Kit, 5-Piece Extract broken bolts quickly and easily Five sizes: 1/8", 1/4", 3/8", 1/2" and 3/4" Required drill sizes are noted on the packaging Bolt extractors Extract broken bolts quickly and easily Includes 1/8 inch, 1/4 inch, 3/8 inch, 1/2 inch and 3/4 inch Required drill sizes are noted on the package