1. Adjustable strength of 10-100 kg, strengthens hand strength, awakens vitality, and relieves hand muscle soreness
2. Rotate to adjust the strength, increase the strength clockwise, and decrease the strength counterclockwise.
3. High-strength thickened spring, made of stainless steel, wear-resistant, non-rusting, non-breaking, long service life
4. Ergonomically designed rubber comfortable grip for a comfortable fit
5. Material: ABS+fine steel
6. Spring diameter: 4mm
7. Strength: 10-100kg
8. Dimensions: 16 x 12 x 2cm
9. Weight: 173g
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