New Festool DD-ES eccentric chuck. Still in originalpackaging, never used. Part number 490294. Great for your Festool tools. 

Switchbetween drill functions in seconds with the FastFix interface, saving time andeliminating cost of dedicated, single purpose tools. The Festool FastFix OffsetChuck places bits flush to side, enabling close-quarters drilling and drivingso you can place holes and fasteners near-perfectly adjacent to walls and intocorners. Significantly faster and easier than the alternative of driving screwsin tight spaces manually. Chuck rotates 360 degrees. Quick-release collar willnot mar adjoining surfaces. Switch between drill functions in seconds with theFastFix interface, saving time and eliminating cost of dedicated, single usetools. Getting the job done right the first time eliminates waste of materialand fasteners and saves valuable time. Works with all existing and previousmodel Festool drills equipped with FastFix interface for toolless change ofchucks: T+3, C12, TDK, TDD, CDD models. Enables close-quarters drilling anddriving, allowing you to get holes and fasteners near-perfectly adjacent towalls and into corners. Switch between drill functions in seconds with theFastFix interface, saving time and eliminating cost of dedicated, single usetools. Getting it right the first time eliminates waste of material andfasteners and saves valuable time. Significantly faster and easier than thealternative of driving screws in tight spaces manually.