Instruct: Classify Amazon reviews into positive or negative sentiment
Query: hand putty

A valuable product which serves to provide strength and flexibility while offering heat to your hand. Good to use after an injury to your hand. I broke my finger and lost a lot of my flexibility when the splint was able to come off for good. Of course be sure to check with your doctor before using this or any product after an injury. My doctor did not know about the product, but after i showed it to him he gave me the green light.