Production Feature

l   External diameter: 3.5 inch/ 88mm,Inside diameter : 1 1/4inch /44mm.

l  Weight: 3.8 once

l  Hand Grip Trainer is a finger-hand-forearm strength and endurance exerciser

l  Made from premium silicone, the high quality item can strenghten your muscle.

l  Great for all different-level major grip trainings types. These rings can be used for Crushing, pinching and even extension.

l  Very portable and easy to use, almost anywhere/anytime - at your desk, stuck in traffic, walking, on the treadmill, etc.

l  Sized especially for adult hands, to maximize the benefits of the exercise and ensure a challenging, yet safe experience.

Use and care

Ring hand grippers are suited for all three major grip trainings types. 
3 LEVEL RESISTANCE
15kg = 33lb,  20kg = 44lb , 25kg = 55lb

Allowing you to gradually increase the difficulty of your training as your strength improves or to benefit from interval training, alternating between the three grips in a single workout. 
So High Recommend You to Purchase Three Different Levels Hand Grip,

SUITS MOST SPORTS - These rings are great for training athletes, and giving their performance a positive boost. Sports such as Tennis, Basketball, Baseball, Golf, MMA, Wrestling, Boxing, crossfit and especially rock climbing can benefit from better grip strength. 

SIZE FOR PERFECT, COMFORTABLE FIT - Sized especially for adult hands, unlike other brands, to maximize the benefits of the exercise and ensure a challenging, yet safe experience. Great for men or strong women.