This brass jump ring opener is a handy tool for jewelry makers and crafters who work with jump rings. A jump ring opener is a metal ring with three slots of different sizes that fits on your finger. You can use it to easily open and close jump rings by inserting them into the appropriate slot and twisting them with pliers. A jump ring opener saves you time and hassle, and prevents damage to your jump rings and fingers. A jump ring opener is an essential tool for anyone who loves making jewelry and accessories with jump rings.