Eagle Tool US ETHXKIT250 Quick Switch Hex Adapter and Installer Drill Bit Extension Kit, 1/4-Inch, Made in the USA Adapt any 1/4" shank cable installer bit or Switch bit to a 1/4" quick change hex Add to a Switch bit to create standard quick change bit Use a Switch Bit Shank to create any length extesion 15" to 69" Patent Pending Made in USA