Well, peening is hammering a bolt on the threaded side to mushroom it out to make it like a rivet, not like that’s what people usually use them for.
I had been told that, but I guess it’s not really accurate. https://en.m.wikipedia.org/wiki/Peening
And normally they are metal, but that exact type of hammer is a weird soft rubber one.
Yeah, I’m a driver, and I replace lights and fuses, fill up tires and fluids, change wipers, and that’s it.
Anything else wrong, it’s mechanic time.