This jump ring opener is an amazing tool for opening and closing any type of jump ring with ease. This tool features three slots of varying widths to fit a variety of jump ring sizes. Just slip the ring into the slot and use your pliers to push down or pull up to open the ring. Opening jump rings is often difficult. But this handy tool makes it a breeze. A must have item for jewelers and beaders! The jump ring opener is 3/4" in diameter and is easily worn on your finger freeing up your hands to use pliers to properly open jump rings. Tip: Use with our Chain Nose Pliers for precise accuracy every time.