• Wedge-type action of the double blade takes a positive
  grip inside the screw slot by manipulating the adjusting
  sleeve and holds the screw in a weld-like grasp,
  permitting you to hold, start and drive the screws using
  only one hand.
• Superb gripping power – adjusts to fit different
  screwheads and avoids damaged slots.
• Hollow ground spring steel blades and unbreakable
  plastic handles.