Package includes: This socket set includes metric and sizes - 1/4", 5/16" (8mm), 3/8", 10mm, 7/16" (11mm), 12mm, 1/2", 13mm, 9/16" (14mm), 5/8" (16mm), 17mm, 11/16", 3/4" (19mm);Surface Painting Process: These broken bolt extractors have a black oxide surface which provides greater strength and durability and prevents corrosion.Easy to use: 3/8 square drive in. Extractor sets have hex flats for use with open-end wrench, pliers, adjustable wrench, sockets or Vise-Grip locking pliers, 3/8-inch square drive for use with hand ratchets, impact wrenches and air ratchets.Storage: Complete with convenient case for easy transport and storage.Application: The game of twist sockets is used to remove rust and wear and to remove damaged locking wheel nuts or bolts, as well as to recoat the paint coating of nuts, bolts.