"The Large Drill Attachment allows you expand on the size range that your XT-3000 can sharpen. This attachment enables you to sharpen drills sized 21-30mm (13\/16\u201d \u2013 1 3\/16\u201d) using the same easy to use sharpening technology. Large drills are expensive to replace, the LEX050 allows you to quickly and easily restore them to as sharp as new. The attachment includes a larger chuck, a larger sharpening port, as well as an additional alignment system for larger drills. Note, this attachment will sharpen but not split the large drills"