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That unit just barely beats finger tight. Don't believe all of the advertising hype about these "impact" wrenches. Few will actually take a tire off of a lawn mower. You'll need a compressor with a large tank, like 20 gallons with a high capacity compressor and a good 1/2" rubber hose. Anything else and yer just screwin' off money. And yes, I have one of those "wrenches" and it's absolutely worthless. Even my Hilti which is a commercial grade impact wrench and is rated at 250 ft lbs won't take a tire off or put it on. Works great at lag bolts though.