With the DEWALT FlexTorq 100-piece impact driver bit set you have everything you need for various fastening applications. This 100-piece set includes bits of all kinds from screwdriver ones to drill bits as well as bit extensions and other accessories. The impact driver bits are a part of the FlexTorq line so they have an extended FlexTorq zone that allows them to transfer optimal torque for applications that need added force. The impact driver bits also have CNC-machined tips ensuring accurate fit on fastener heads. And with black oxide coating these bits are protected from rust and corrosion. Speaking of protection this 100-piece set comes in a ToughCase?+ system which optimizes storage space and keeps the bits well-organized and easy to remove.