Hand Exercisers features: 72mm Pull Up Balls For Arm Finger Muscles Strength Training Gym Workout Hand Grip Fitness Climbing Power Ball Exerciser| Hand Grips(Yellow) Features: PRACTICAL: Pull-up ball can be a handy handle for gym equipment, increases forearm muscles and grip strength, boosts endurance and explosiveness. It is ideal not only for normal fitness, but also for extreme sports such as rock climbing enthusiasts, wrestling, ninja s, gymnastics, and parkour. DURABLE & SAFE: The ball is made of composite material, the carabiner are made of 304 stainless steel, the webbing is made of Nylon, all these hardware makes and their connections are heavy duty and sturdy, more than adequate. PERFECT DESIGN: This pull-up ball design bring more fun to your exercise. The ball has many spherical grooves, so your hands are not easy to slip off. The ball has 2 different diameters for your choice, according to the size of your hands and whether you are beginner or professional. SIMPLE TO USE: An excellent addition to your workout routine. Switch between pull-ups and chin-ups without ever letting go. Easy to setup and use, and it's insanely fun to be on. Size:72mm Color:yellow Material:PC Function:Exercise arm muscles and grip strength Style: 2*Pull-ups Balls 2*Matching Webbing 2*Stainless Steel Carabiner Note: Product sizes are measured by hand, please carefully compare the size when purchasing. Please allow 1-3cm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding.