Recommended for: Those who want to improve sports performance Those who want hand rehabilitation or maintain health Those who easily feel stressed Those who want to do some light exercise while working from home Hand grips that allow you to easily train your grip strength at home! Effective not only for strengthening grip, but also for increasing forearm strength and relieving stress. ::::::::::::::::::::::::::::::::::::::::::::: <Color> Black <Material> Silicone <Size> Diameter 7.8cm Thickness 2.5cm <Resistance> Red 40LB-50LB (18kg-23kg) Black 70LB-80LB (32kg-36kg) Also available as a set of 2 We have many other wonderful products for sale ::::::::::::::::::::::::::::::::::::::::::::: <Notes> ・Colors may appear different depending on the monitor you are viewing. ・As this is an imported product, the build quality may be less refined than Japanese products. ・If you have any issues after receiving your order, please contact us "before" leaving a review. We cannot address issues after a review has been submitted. Hand grip ring, hand grip, fingertip strengthening, grip strength training, grip strength enhancement, unisex, for men and women, exercise equipment, silicone, exercise, muscle training, grip strength, powerful, expander, muscle, exerciser, stress relief, nursing care equipment, rehabilitation, portable, washable