Irwin 394002 Bolt-Grip Expansion Set

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; When you are faced with a rounded off, rusted-tight or painted over bolt, bolt extractors will break it free; Set includes plastic case; 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: 8mm, 10mm, 13mm, 19mm, 5/16″, 11/16″, 3/4″ in drive size 3/8″.