Replacement Bearings for Medicool Pro Power 20K Handpiece Drill & Drill Assembly is not included. This is for the purchase of bearings only. Replace these bearings to have a smooth and quiet drill. In most cases it will even stop your drill from heating up if you happen to have a clogged bearing. Interested in a Repair? Please inquire with us as we do have a Repair Service for all Makes and Models of Drills.