I have one - never use it much, since I also have on-board air, but the
couple of times I used it, I found it surprisingly "torquey". However, that
torque comes at a price, which is speed of use. The thing has to "wind up",
then a solenoid trips and it slams home. You get maybe 1 blow every 2-3
seconds. On the plus side, it should only take 2 or 3 blows to break loose
your average lug nut.
Overall, not a bad thing to throw under the back seat, and certainly better
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