When you really want to make some time driving screws, there is nothing like having two drills on hand – until now! This innovative system makes it easy, and fast, to switch between drilling a pilot hole and driving the screw. Unlike other systems, the drill bit / countersink screws onto the adapter creating a rigid assembly, which then slips onto the driver bit in your drill. The drill bit may be adjusted for length before locking it into the countersink collet. The only downside to this great system is that the quick change body doesn’t work well with our standard two piece driver bits unless you skim them with a file – it works great with Jack Rabbit or standard Square, Phillips or slotted one piece bits however. Made in USA.