The Click HeartStoppers from addi are a necessary addition to the most comprehensively efficient interchangeable knit and crochet system available: the addi Click System. The HeartStopper quickly and easily clicks onto the end of the addi Click cable. This means you can free your Click tips for additional projects, make flexible straight needles, create Tunisian crochet hooks in a multitude of lengths, and more! Each pack contains 2 lightweight heart shaped stoppers.