• Split-blade screw-holding
  driver wedges into screw slot
• Positive gripping action
  holds, starts, and drives slotted screws in awkward, hard-to-reach
  places
• Not designed for torquing or
  tightening
• Blade thickness of .043″
  expanding to .085″
• Overall Length: 9-3/4″ (247)
• Shank Length: 6″ (152)
• Shank Tip Width: 1/4″ (6.3)
• Weight: .15 lbs

Klein
Tools NK36 1/4″ Slotted Screw-Holding Screwdriver