I'm disappointed with this product. It doesn't do any jelqing job at all. This is just one twisted metal bar over the other that doesn't jelq but hurt you instead. The experience was not good, it was painful, I consider this item unsafe. One thing is the illustration on the list and the package when you receive it, but the operation makes the product really difficult to use, it is too uncomfortable, I didn't like it at all, surely is better jelqing with your hands instead, I had to waste time to return it, do yourself a favor, and don't waste time and money with this.