The genuine Milwaukee M18 impact driver is the pick for best overall at a
1.8 average finish. It drove a 5-in lag bolt in 6.86 seconds, the fastest
time in the review, produced 261 ft-lb of tightening torque, and stayed under
140°F while its $47 counterfeit crawled to the same result in 31.56 seconds
at 289°F. The genuine DeWalt Atomic 1/2-in wrench is the pick among the
wrenches at a 2.0 average, burying the 10-in lag bolt at 1,098 in-lb and
pulling lag bolts in 3.29 seconds, and the genuine DeWalt DCF860 driver
rounds out the top three at 2.5 with the fastest deck-screw time of 1.01
seconds.
Every genuine tool outperformed its counterfeit. The fake drivers were the
weakest of the lot, finishing 7.3, 9.0, and 10.0: three times slower on deck
screws, two to nearly five times slower on lag bolts, and two of the three
only just past the 100 ft-lb reference on tightening torque. The two
counterfeit 1/2-in wrenches held up better at 5.6 each, and the fake
Milwaukee wrench even beat the genuine one on the 5-in lag bolts, but it fell
to 450 in-lb against 865 on the 10-in bolt, and the fake DeWalt wrench shed
a part on the same test.
The buying guidance follows the numbers: a name-brand impact tool at a
fifth of retail is not a bargain, it is a different tool wearing the badge.
Missing country-of-origin markings, a dim work light, a quarter inch of
anvil end play, and a control pad that does not match the maker's photos
are the field checks. Spend the extra up front for the genuine product from
an authorized seller; the counterfeits here were four times cheaper and, on
the work that matters, about four times slower.