*Drop forged, chrome vanadium steel,
 heat treated with polish chrome plated.
*Designed to work on 6 point, 12 point,
  spline, star, square and removal of
  partially rounded 6 point hex fasteners.
*Perfect for removing stripped, rounded,
  rusted and even damaged nuts and bolts.
*Sizes include: 4mm/5/32, 4.5mm/3/16,
  5mm/13/64, 5.5mm/7/32,
  6mm/1/4, 7mm/9/32,
  8mm/5/16, 9mm/11/32,
 10mm/3/8, 11mm/7/16,
 12mm/15/32, 13mm/1/2.