Bought this 

 Hand Strengthener Finger Exerciser with Tension Adjustment

for myself as i had a stroke and my fine motor skills have yet to come back , im too good at writing with a pen and have to get other people to fill out my forms and prescriptions , ive only had it a week and im starting more strenght in my fingers , you can adjust it so ive startest off with easiest hoping to be on hardest very soon.

My husband also uses the electric guitar and he has been using it 

 It works perfectly, 

good quality 

works well 

no problems with seller 

This came well packaged and the next day 

#rankboosterreview #sponsored #Mugig 

https://www.amazon.co.uk/Mugig-Strengthener-Exerciser-Adjustment-Physical/dp/B01DP8S9OW