See I guess cloudtail have taken some permission from amazon as well as from seller to sell this particular product. Amazon won’t allow jumping into his listing because he has TM. Why to get more trouble if your product is selling good.
I have discussed your query with Vikash sir and he is asking whether you have created a book that he told you to?
This is going to be nice thing in your product. Print a book which contain certain exercise and how handgripper is going to help you out with that.
Hope this helps, but let me know if you have any questions!