Penis problem

Patient: Hello,Dr, I just want an advice. Actually the problem is my age is 21 and my Penis size is 5 inch and it’s not thick enough. So just for that problem i was searching for any product which can solve this problem, then I found out a product named “Lust Buster Pump”, Is it safe to use it ? are there any kind of side affects ? it would be really thankful if you could guide weather i should buy this or not ?