About this item Durable And Resistant Material: Easy Out Bolt Extractor Set is Made Of Cr-Mo Steel And Cobalt Fortified Hss Material, Which Increases Durability And Service Life. Hss Is Harder, Tougher And Easier To Drill, Turn And Remove Damaged Screw Or Bolts Than Other Materials. Multi-Size And Easy To Read: 13pcs Bolt Extractors, 6pcs Spiral Screw Extractors And 6pcs Left Hand Cobalt Drill Bits, It Save Time And Effort. All The Size Is Engraved Clearly On The Socket For Easy Identification. We Add More 4pcs for Replacement. Multi-Purpose: Ez Out Bolt Extractor Set That Remove Broken Screws, Whether Working On Wood Or Metal, Are Ideal For Construction, Automotive, Home Diy Projects Or For Industrial Use.Suitable For Most Job Applications. Widely Use :Suitable For Both Power Tools And Hand Tools, High Density Spiral Design Helps Faster Removing Broken Screws, Bolts, Nuts, Studs, Rusted And Frozen. Easy Of Removal: The High-Density Spiral Design Helps Faster Remove Damaged Or Frozen Screws, It Can Provide You With Great Convenience. Overview Material: Chromium Molybdenum Steel, Cobalt Fortified High-Speed Steel Finish Type: Uncoated Shank Type: Straight Brand: DUNDOO Tool Flute Type: Spiral