JD Jingzao Adjustable Spring Hand Grip Strengthener with Counter Finger Strength Training Equipment

Surface treated with scratch-resistant, corrosion-resistant, bright chrome plating, nickel plating for rust prevention, and precision transition layers for enhanced adhesion and durability

Ergonomic rubber handle with anti-slip design for comfortable grip fitting each finger

Low noise design with noise levels ≤10 dB during use for quiet exercise experience

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

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

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 to prevent entanglement

Inspect device before use to ensure no damage

Warm up before exercise 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 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

Basic model

Counting model

JD Jingzao is JD Group’s proprietary brand, emphasizing high cost-performance products developed through independent design and direct cooperation with quality factories. The brand offers a wide range of products with superior quality at competitive prices, focusing on excellent materials, craftsmanship, and strict quality control. The design philosophy centers on simplicity, harmony, and everyday beauty, providing consumers with reliable and convenient one-stop shopping solutions.