IRWIN 3052009 2P 2-3/4" Power Bit - Screwdriver Socket Bits - Amazon.com
Slot (Flat) Screw Driver Insert, Power Bits 4 to 12 1/4" Hex Drive
Double End for pH Head 1/4 Inch Hex Shank Hand Tools Magnetic Screwdriver Impact Driver Power Bit - China Hand Tool, Screwd River Bit | Made-in-China.com