JD Jingzao Adjustable Spring Hand Grip Strengthener Finger Training Equipment Non-Counting Version

Ergonomic rubber handle with anti-slip design

Comfortable grip fitting each finger

Solid steel construction resistant to deformation and breakage

Scratch-resistant and corrosion-resistant coating

Bright chrome plating for enhanced texture and aesthetics

Nickel plating for rust prevention

Precision transition layer to strengthen adhesion

Emergency window-breaking hammer with titanium alloy tungsten steel head for safety

Low noise operation with noise levels ≤100dB (car horn), ≤30dB (normal conversation), ≤15dB (hand grip pressing), ≤10dB (falling leaves)

Compact and portable, similar in size to a mobile phone for easy carrying

1. Hold the handle and rotate to adjust grip distance

2. Open the handle and rotate to adjust resistance level

Suitable for adults; children, elderly, or disabled persons should use under supervision

Avoid use if joints or muscles have chronic injuries

Do not wear loose clothing during use to prevent entanglement

Inspect device before use for damage or malfunction

Warm up before exercising and increase intensity gradually

Use only as intended for hand grip training; misuse may cause injury

Do not modify the device or use non-manufacturer recommended accessories

Clean with water and dry in a cool place after use

Store out of reach of children

Regularly check for loose parts to prevent hazards

JD Jingzao is JD Group’s self-owned brand, emphasizing high cost-performance products with direct factory cooperation, strict quality control, and thoughtful design for everyday use.