*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: 6mm/1/4, 8mm/5/16,
  10mm/3/8, 11mm/7/16, 12mm/15/32,
  13mm/1/2, 14mm /9/16, 6mm/5/8,
  17mm/11/16, 19mm/3/4.