Grip Strength Trainer,Hand Strengthener,Forearm Workout - Trainer Silicone Rings for Rock Climbing, Athletes & Stress Relief Rehabilitation, 3 Resistance Levels(3 PCS) Lab Supplies The thickened buffer layer disperses

The thickened buffer layer disperses external forces to avoid internal fractures caused by frequent bending

these reinforced handles ensure ease of movement and placement

Good Sealing

Please check the second picture for more detail size

Grip Strength Trainer,Hand Strengthener,Forearm Workout - Trainer Silicone Rings for Rock Climbing, Athletes & Stress Relief Rehabilitation, 3 Resistance Levels(3 PCS) Lab Supplies The thickened buffer layer dispersesStrengthen your wrists, improve the dexterity of your fingers and increase the strength your hands can apply while reducing fatigue. Its rally value is from 30 to 50 lb. Help balance your grip muscles and your expanding muscles. Ideal for athletes(tennis, basketball, boxing, golf and shooting)and musicians (guitar players, bass players, pianists and violinists). Portable and easy to fit in bag or pocket. You can get repetitions in while driving, at