ARK's Krypto-Bite® Gem Necklace provides a safe, wearable, and discreet solution for kids and adults who need to chew. Use this "chewelry" as an oral fidget (or even hand fidget) to help calm, soothe, and self-regulate during times of stress, or to better focus during homework and other activities. Each pendant is sold individually with its own necklace cord. Comes in 3 color-coded toughness levels: standard - recommended for mild chewers, XT for "Xtra Tough" - for moderate chewers and XXT for "Xtra Xtra Tough" – for avid chewers.