Allows you to drive screws or drill holes in extremely tight or hard to reach spaces without the need for dedicated tools Accepts Festool Centrotec or adjustable 1/2 inch chuck. Chuck rotates 360 degrees with 16 presets. Switch between drill functions in seconds with the FastFix interface, saving time and eliminating cost of dedicated, single purpose tools Getting it right the first time eliminates waste of material and fasteners and saves valuable time Fits all existing and previous model Festool drills equipped with FastFix interface: T+3, C12, TDK, TDD, and CDD