The Dremel Tool.

[wangpushups]

Without it, making my combustion would've been impossible. This is by far the best invention for power tools. I bought it just for the sole purpose of building my gun but now i can use it for anything. Great investment.

[frankrede]

I have built most of my guns without the use of a dremel.
But they are useful tools indeed.
My favorite part is buying all of the accessories:)

[dauphinoise potato]

I'll need a dremel for the breech loading on the next launcher I'm designing, spose a hack saw, jig saw and file could do a just as good job. But much more labourious.

[homedepotpro]

hells yes. Iv had mine forever and I use it all the time. currently im using it on my aluminum knuckles

[jrrdw]

Getting them to run balanced can sometimes be tricky. The keyless chucks kinda suck, but thats the only complaints i really have about them. Well one more, there only good on small scale stuff, otherwise it takes to long to get the work done. I've got a ton of things for mine over the years.

[ALIHISGREAT]

what kind of stuff do you use your dremel for then?

[jrrdw]

Basicly cleaning in tight places, sometimes i port cylinder heads along with intake manifolds. Cutting in tight places, notice the theme -- tight/small places. If it weren't for the incredibly high speed, they would only be good for soft work.

[PVC Arsenal 17]

I use a Dremel for removing the "step" inside certain fittings that prevent pipe from sliding completely through.

Other than that, I don't use it for much. But I can see one coming handy for a lot of other things.