Using this stove control knob kit is easy. First, remove the old knobs from your stove or cooktop. Then, choose the appropriate insert from the kit that matches your shaft size. Insert it into the new black knob and then attach the knob to the stove. If you want, you can use the decals to number the knobs or show temperature. When handling the knobs, be gentle to avoid damage. Keep the kit in a dry place when not in use. If you notice any issues with the knobs or inserts, contact us. To maintain the knobs, simply wipe them with a soft, damp cloth from time to time. This will keep them looking good and working well for a long time.