Festool 490294 FastFix Eccentric Chuck Enables close-quarters drilling and driving, allowing you to get holes and fasteners near-perfectly adjacent to walls and into corners Switch between drill functions in seconds with the FastFix interface, saving time and eliminating cost of dedicated, single use tools Getting it right the first time eliminates waste of material and fasteners and saves valuable time Significantly faster and easier than the alternative of driving screws in tight spaces manually Fits all existing and previous model Festool drills equipped with FastFix interface: T+3, C12, TDK, TDD, and CDD