Features:1. EASY TO USE: By rolling up and down, these finger massage rings will help you to release anxiety, reduce stress, increase focus, attention and concentration.2. ONE SIZE FITS MOST: Put it on any finger of your hand, and slightly roll the ring back and forth along the finger.3. DURABLE MATERIAL: Made of high quality alloy material, which is durable, reusable and stain resistant. 4. WIDE USES: These finger relaxing rings are suitable for teachers, students, therapists and longtime computer users who need finger relaxing.5. PACKAGE: Each package comes with 1/5/10 pcs rings in random color. Please contact us without hesitate if you have any questions. Notice:Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Description:Material: alloySize: 2.8cm in diameterBattery: NoColor: RandomWeight: 3.5g(single)