1Enhance hand force, finger force, five fingers repeatedly hold the ring, promote the stimulation of the hand acupoints. 2Hand training ring is non-slip, can enhance grip strength and forearm strength, promote hand blood circulation. 3Can be used for rehabilitation after injury, to restore strength for the arm. 4Made of quality silicone material, soft and odorless, non-toxic and harmless, durable for use. 5Light weight and in small size, you can exercise hand and finger strength at anytime and anywhere.Condition: 100% Brand New Item Type: Hand Exercise Tool Material: Silicone Optional Color: Light Gray, Dark Gray, Black Size: Hand Shaped Finger Stretcher: Approx. 9.5 x 7.5 x 0.8cm / 3.7 x 3 x 0.3in, Gear Shaped Hand Training Ring: Approx. 7 x 7 x 1.8cm / 2.8 x 2.8 x 0.7in Instructions for Use: Different colors represent different power requirements1 x Hand Shaped Finger Stretcher1 x Gear Shaped Hand Training Ring1. Please allow 1-2mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.