Festool 493539 Fastfix Depth Stop Chuck for Drills Save time: set it once and forget it, without the need to constantly adjust torque settings on drill Expand the versatility of your Festool drill with FastFix interface Lighter, more compact, and more flexible than a dedicated drywall gun 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