Crochet hooks that light up!! Definitely our most popular crochet hook. I love using these to crochet on dark yarns like black and navy blue. Enables you to easily see your stitches on dark yarn or dimly lit spaces. Each one comes with a battery but I also sell the pack of 3 replacement batteries. The batteries last a very long time if you remember to turn the crochet hook off when you are done crocheting. I am guilty of forgetting to turn mine off!