IRWIN HANSON Professional's Industrial Bolt Extractor Set, 13 Piece, 54113 Frees rounded-off, rusted-tight or painted-over bolts Reverse spiral flutes are designed to bite down to provide maximum gripping power High carbon steel for greater durability and a longer life Universal lobular design fits all types of fasteners Set includes carrying case and extractors to remove bolts sizes: 8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 16mm, 17mm, 19mm, 1/4", 5/16', 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" in drive size 3/8"