Features and Benefits: Designed specifically to remove lugnuts; Reverse spiral flutes are designed to bite down to provide maximum gripping power; High carbon steel ensures longer life and greater durability; Universal lobular design fits all types of fasteners; Set includes plastic case; When you are faced with a rounded-off, rusted-tight or painted-over bolt, bolt extractors will break it free. 3/8" square drive for use with hand ratchets, impact wrenches, and air ratchets; hexagonal flats for use with flat wrench, pliers, adjustable wrench, sockets or Vise-Grip locking pliers. Set includes bolt extractors to remove bolt sizes: 19mm, 21mm, 22m, 24mm, 3/4", 13/16", 7/8", 15/16" and 1".