Hand Exercisers features: Hand Grip Exercise Wrist Arm Trainer Adjustable Anti Slide Device Strength Muscle Forearm Training Sports Home Gym Equipment| Hand Grips Hand Grip Exercise Wrist Arm Trainer Adjustable Anti-Slide Device Strength Muscle Forearm Training Sports Home Gym Equipment Product information Material: ABS plastic, carbon steel, sponge Size: 12.5*10*21 cm Color: Black Applicable scenarios: Gym / home / office /Stadium Applicable people: Unisex Packing: 1* Adjustable wrist hand grip Feature 1. Adjustable strength 2. Controllable hand holding distance 3. Spring design 4. Sweat-absorbent hand-held foam 5. Hard foam gasket Wrist training device Adjustable wrist training device Professional training of hand strength You can change yourself from the strength of wrist training 1. Wrist 2. Arm line 3. Arm muscles Core exercise arm muscles 1. Extensor carpi radialis longus 2. Extensor carpi ulnaris Exterior design 1. Adjustable strength Adjust the training intensity according to different strengths. 2. Controllable hand holding distance 4 kinds of gears, adjustable hand grip distance, no matter the person with long arm or the person with short arm can use. 3. Spring design The high-carbon steel spring has a strong firmness, and can rebound to the original position after repeated stretching. 4. Sweat-absorbent hand-held foam Absorb sweat and wick moisture, hold the foam, keep it dry, let you get rid of the trouble of hand sweat. 5. Hard foam gasket Keep your arms in a stable posture to exercise, while being comfortable, but also protecting them from injury. Use inustruction 1. Holding the wrist device, palms facing out, lift the wrist force downward,slowly restore after liting. 2. Hold the wrist device backward, palm facing inwards, lift the wrist device upward, slowly restore after lifting. Product parameter Real picture Buyers show About After Sale Service 1. We support after-sales service, if the buyer doesn't receive the goods in time, please link us at your convenience. We will link the post office for details of this package and link you. 2. If this product have any problem or defect when you receive it, please don't worry, just link us in time. We can give you a better solution and you will be satisfied with after sale service. Thanks