Help you to get the thread through the eye of the needle; It is helpful for the old or people with low vision, arthritis or hand tremors, or any one who do not have patient to thread the needle; Use: Insert the needle tip in the hole on the top, then press the yellow or green part of the threader by your thumb to make the hook through the needle tip, push wire hang on the hook; at last, release the yellow or green part and the threading is finished.