It's thicker in diameter and thus gives more of a stretch to hit trigger points without having to be maneuvered as much. At least that's what it was for me. And I could barely get halfway in because the muscles were so tight.

https://www.amazon.com/dp/B086KSVNF2/ref=cm_sw_r_wa_apa_fabc_gZXcGb13PNXKH?_encoding=UTF8&psc=1

Because I had so much luck and relief with that I decided to order a dilation kit that I will be using tonight. And I would recommend getting this over the prostate massager because it's sole purpose is dilation.

https://www.amazon.com/dp/B081HD7LKL/ref=cm_sw_r_wa_apa_fabc_J1XcGb03EXTEC