DESIGN: This swivel ring is CNC cut into a smooth ring with precisely curved edges to prevent buildup at the seams. Each gadget is assembled by hand. Simply turn one side of the ring edge and the entire pinion ring will begin to run smoothly.SIZE: Size 7/8/9/10/11/12. please refer to the picture details for exact measurements.MATERIALS: This ring is made of copper 3-layer platinum plating and AAA+ cubic zirconia, which is strong and flexible, and the cubic zirconia bezel setting is not easy to come off. The smooth surface inside the ring and around the edges will not scratch your fingers and will retain its color for a long time without turning your fingers green. But be careful to avoid contact with alkaline shower gel.FUNCTION: When you feel tense or anxious, this ring can help you release your emotions, they can rotate smoothly to ease and relax your emotions. If you have a bad habit of finger picking or finger biting, you can also use it to improve.AS A GIFT: This spinning ring is a fun gift for women and men, friends, family, husbands, wives, sons, band members, people who love machinery. And it can be used as Christmas gift, Thanksgiving gift, birthday gift, graduation gift.