AIR IMPACT WRENCHES
Rattle guns, both air and electric, are great for taking things apart.They have so much power!
They are just wonderful. With an air gun you can pop the nut off a flywheel without locking the engine (usualy..most times..)
However... use an impact gun to tighten nuts, bolts or screws down. Oh sure, you can use them to run long screws and the like down, if you start them by hand first, but never run them in hard.
There is just too much power and no "feel" to them. A 1/2 inch gun can twist a 3/8 inch bolt in half real easy. A 3/8" Butterfly gun can do the same to a 1/4" bolt. Always assemble things with hand tools and use a torque wench.
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