Description: Material: This hand grip strengthener is made of PP and high carbon steel, offering adjustable strength, intelligent counting, and power training. It's great for fitness and muscle training.Easy to Use: Simply press and rotate to quickly reset the counter. The device is sturdy, strong, and features a high strength thickened spring for long lasting use.Adjustable Strength: With an adjustable force range from 10-100KG, this hand grip is suitable for everyone in the family to exercise with.Electronic Counting & Anti Slip Handle: The electronic counter allows you to easily track your exercise repetitions which can be reset for repeated use. The anti slip handle with ergonomic design fits the curvature of your fingers perfectly.Applicable People: Wrestlers, athletes, musicians, muscle builders, and exercise trainers, whether they are beginners or professionals, this grip exerciser is the best choice. Specification: Material: PP,Carbon Steel Size Chart: 12cmx17cm/4.72inchx6.69inch Package Includes: 1 Hand Grip Strengthener Note: Please allow slightly errors 1-2cm differences due to manual measurement.