Dual Head Hooked Crochet Needles 10 Pcs Red Blue Yellow It usually takes around 1-4 Weeks Time to deliver after Item has been Dispatched. Please Check the Delivery Time Before Making Purchase(s). Crochet hooks can be used in many instances where it is necessary to pull a string through a hole. Many knitters use them to fix dropped knitting stitches, and tailors may use a crochet hook to thread a drawstring through its casing.