This nifty ring is handy to open/ close jump rings. Used together with one of the pliers (Flat Nose Plier or Round Nose Plier), it helps increase efficiency and free your hands from having to hold 2 pliers at the same time.
Dimension: 1.7cm/ 0.67in in diameter and bandwidth of 0.8cm/ 3.1in
Can be worn in any preferred finger.