https://myria.com/how-does-a-cast-saw-work-without-cutting-you https://myria.com/how-does-a-cast-saw-work-without-cutting-y... tl;dr it vibrates instead of rot

https://myria.com/how-does-a-cast-saw-work-without-cutting-you https://myria.com/how-does-a-cast-saw-work-without-cutting-y... tl;dr it vibrates instead of rotating which doesn't break skin because skin is flexible