which fire extinguisher?

I'd prefer to do this outside but I know I won't get done in a day and before I can get back to it the rain will start. Soo, I've cleaned a spot in the garage(barely) to squeeze in and change the shackles and mounts on the Ranger. Planning to use a die grinder with carbide bit for the rivets and whatever for the bolts and bushings. No torch except propane which I hope not to have to use. What would you recommend for a fire extinguisher? The lawn mower and gas cans will be outside. Any papers or corrugated will be up and out of the way. Don't think I have to worry about the metal burning ( as in magnesium type fires). What do you have in your garage? Thanks! Bob