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1. Adjustable strength of 5-100 kg, strengthens hand strength, awakens vitality, and relieves hand muscle soreness 2. Rotate and adjust the intensity to meet the needs of different groups of people for family exercise. 3. High-strength thickened spring, made of stainless steel, wear-resistant, non-rusting, non-breaking, long service life 4. Ergonomically designed anti-slip grip, comfortable fit 5. Material: PP+high carbon steel 6. Spring diameter: 4mm 7. Strength: 5-100kg 8. Size: 11 x 16cm 9. Weight: 160g
