Bi-Directional Design for Removing or Tightening Damaged FastenersTapered Entry Enables Socket to Easily Seat on a Damaged FastenerDual Sized Sockets Designed to Work with Both SAE and Metric FastenersSquare Drive with Hex Base for Use with Impact Gun, Ratchet, Wrench, or PliersChrome Molybdenum Alloy Steel (Cr-Mo) for Exceptional Strength and Long Lasting DurabilityHigh-Visibility Laser-Etched Markings Provide Quick Size IdentificationBlack Oxide Coating Provides Superior Corrosion ResistanceUp to 10x Longer Impact Life vs. CompetitionUp to 5x Greater Torque Output vs. CompetitionSocket Rails Included for Convenient, Compact and Organized Storage7mm 8mm [5/16 in] 10mm 11mm [7/16 in] 12mm 13mm 14mm [9/16 in] 16mm [5/8 in]