Hard skin - on the balls

Sounds like you have a corn in the middle of the callus. I don't know about the product so couldn't recommend it. By far the best thing would be to see a local podiatrist / chiropodist, even if it's just for a one off. You have a much better chance of keeping it away once it's gone than you have of getting rid of it safely by yourself.
They can give you some advice on how to avoid getting it back.

Richards pulls on his balls to steer his long, hard cock straight up in the air. What a beautiful piece of meat. Can you imagine sitting on that? It's a long one, so you know it's going to slide deep inside of you and feel really good.

Hard Skin - On The BallsHard Skin - On The BallsHard Skin - On The Balls