*CR-MO alloy steel with manganese
  phosphate finish.
*With inside hexagon spherical construction,
 that provides better torque and life then
 traditional universal socket was ball with
 a pin type; however the pin will be broken
 easily, and the torque is smaller.
*Suitable for narrow working area.
*Size:
   12-hex universal impact: 10-11-12
      -13-14-15-16-17-19-21-22
     1-impact extension bar 125mm long