I do not find it scary. But, the entire unit (the part you showed is just a replacement part for the entire Sqweel
unit) would not be strong enough for me. I have read in reviews that pressure stops the wheel and I need pressure to get there.
It's not the toy I would like. But, women who like a kinda gentle semi oral sex experience may like it.
Here is what the entire Sqweel looks like.
The thing you showed is a replaceable, alternative textured wheel for this device.