1. Helps relieve hand muscle pain and strengthen finger dexterity 2. 5-60kg adjustable, suitable for the whole family 3. 2.5mm diameter built-in pressure spring, repeated use of the elasticity does not deteriorate 4. Ergonomic handle, comfortable to hold, using one-piece technology, solid and not fall off 5. A variety of exercise positions, exercise different muscle groups 6. Material: nylon, metal, ABS 7. Power supply for counting models: button battery included 8. Strength: 5-60kg 9. Size: about 15 x 11cm
