Made in the USA Internal hex for attaching 1/4 hex shank in drill bits Custom slip resistant nylon patch set screws Three flat non-slip grip on the chuck end Add a Quick Switch Hex to adapt to a Quick Change chuck part number ETHXKIT250 Eagle Tool US new multi use extension. This extension can be used to extend the reach of any 1/4 in. Cable Bit or any 1/4 in Hex Shank drill bit.