Oh wow it certainly is an ass hole stretcher. As you say it is great to open the hole ready for bigger dildos and plugs.Definitely too wide for my hole at the moment. I still cannot take my 3.5" red Anal Destroyer butt plug, its too firm.
Hello. This toy is quite a bit bigger than you point out. It is 95/97 mm wide (3.8"). Indeed, due to their geometry, they cannot function as a plug, but only expand and enter as far as they can stop. It's very stiff and what it does is open your anus already enough for bigger toys or plugs. It's just that it's huge and opens you up completely, even though you can't keep it inside.
It looks like my King Size Anal Domber - 9" long x 3" wide. A nice butt plug but I just can't get it to stay in despite taking it all. Needs a longer neck to the base.