The lighted crochet hooks set is a perfect kit for crochet enthusiasts and the best gift for crocheters!With this LED Lighted Crochet Hook Set,You can see it very clearly when you're crocheting,Especially helpful when working with dark colored yarn.You'll never have to stop or slow down again because of bad light or dark yarn.meet your crochet needs fundamentally.Two adjustable brightness levels ( Dim or Bright ) - Suits Various Lighting Conditions for effortlessly crochet and see clearly with even the darkest yarn. Especially perfect for crocheting with dark colored yarn or when you just need more light to croche.The crochet hooks have a built-in battery which can be recharged and reused.No need to buy battery refills, saving your time & money.15 minute quick charging and long lasting battery 7-9 hours.USB charging can be done by wall adapter, power bank or desktop/laptop computer etc.How to change the hook head: Use the small wrench to loosen the hook head out. choose the size you want,align the protruding part near the marked size with the slot of the handle joggle. Aim the wrench at the groove on the hook head,tighten the hook head until you hear a click.