Nothing else looks or feels quite the same. There are two different diameters in two different lengths, for a total of four sizes. For those who get into the feeling of a metal ball stretcher, nothing else feels quite like it. These are good-quality rings at an excellent price.
I had a hard time ( No pun intended) getting both balls through the hole..but once I did,it was not too bad.It was comfortable enough to wear for long periods of time.