Replace these bearings to have a smooth and quiet drill. In most cases it will even stop your drill from heating up if it happens to have a clogged bearing that you are having. The box in blue show where you use the tool. *Drill is not included* 1. Genuine bearings from Japan. 2. High quality bearings are made specifically for these drills. 3. Meets & exceeds the speed ratings that these drills requires. 4. Smooth at high speed. 5. Quiet at high speed. We only sell these bearings and installation instructions DOES NOT come with the purchase. Please do not purchase if you do not know how to install it yourself. Blue box shows where to use the screwdriver. If your drill needs to be serviced by a professional please inquire with us as we do have a repair service for these drills. Thank you for understanding.