BITE HARDER & HOLD STRONGER - the product's thread structure has been upgraded with optimized engagement geometry, ensuring superior interlocking with damaged fasteners. This enhancement effectively resolves slippage risks during extraction while improving operational efficiency and extending service life; HARDER THAN YOUR TOUGHEST BOLT - the product utilizes Cr-Mo steel construction to ensure structural integrity, effectively preventing deformation or secondary damage during fastener extraction. Enhanced with phosphating and blackening surface treatment, this corrosion-resistant finish significantly extends service life; PACKAGE CONTAIN - Bolt Extractor:1/4"",5/16""-8,9,3/8"",10,7/16""-11,12,1/2"",13,9/16""-14,15,5/8""-16,17,11/16"",18,3/4""-19. 3/8""-1/2” Adapter. 3/8"" Hex Adapter. Knockout Pin; WARRANTY - as a responsible company deeply committed to the tools category,we will always stand by our Bolt Extractor Kit, guaranteed for ONE YEAR. if you experience any quality issues or accidental damage within the warranty period, please contact us for replacement parts. Product description 2025 Innovation Awards Winner Solution for Every Stripped Fastener, Covering All Automotive Needs Equip Like a Pro, Fix Like a Boss