Using this stove control knob kit is easy. First, remove the old knob from your stove. Then, choose the appropriate insert from the 5 different ones provided based on your stove's shaft size. Insert it into the new black knob, making sure the flat side of the D - shaped part is in the right position. Attach the red pointer insert if you want a clear indication of the setting. If needed, use the decals to mark numbers or temperatures on the knob. When handling the kit, be gentle with the inserts as they are small and delicate. Avoid using excessive force when attaching the knob to the stove to prevent damage. For maintenance, clean the knob with a soft, damp cloth regularly. Don't use abrasive cleaners as they can scratch the surface of the knob. If you have any problems with the kit, feel free to contact us, as we've been in the appliance parts business for over 25 years and are here to help.