Set Includes: 1 Each of #1, #2, #3, #4 And #5 ExtractorsFor Bolt Sizes: #8 - 3/4"Designed To Remove Broken Studs, Bolts And ScrewsAggressive Left Hand Spiral Design For Extra Gripping PowerSpiral Flutes Are Designed To Embed Themselves Deeper Into The Metal As You Turn The ToolFor Use On Right Handed Bolts And Screws Only