3/4-Inch Impact Wrenches Compared: Bosch ProFactor, Snap-on CT9175, and Acropow

Introduction

The 3/4-inch cordless impact wrench class is getting interesting. On one end there is Snap-on’s newest and most expensive impact ever, the CT9175. In the middle sits Bosch’s ProFactor 3/4-inch, a familiar-sounding package at a mid-range price. And at the surprising end, a $130 Amazon hopeful called the Acropow that runs on Milwaukee M18 batteries and, on test numbers, rewrote expectations for what a budget tool can do. Here is how they compare.

Bosch ProFactor 3/4-Inch Impact Wrench

The Bosch ProFactor 3/4-inch looks a lot like the brand’s well-regarded half-inch ProFactor high torque with a larger anvil swapped in, which is how most brands build their 3/4-inch cordless models. The catch is the price: it cost $369 in testing, essentially a premium for the anvil change.

In a 5-second working torque test in forward, it posted 501 foot-pounds, nearly identical to the half-inch version of itself. In the longer max-torque test it reached 812 foot-pounds with no meaningful battery difference. The guidance is clear: avoid Bosch’s small 4 amp-hour battery with this tool, which struggled badly, and use proper ProFactor packs instead. On the overall scoreboard it landed lowest of the three, a rare Bosch cordless result that does not justify its price over the half-inch it shares internals with.

Snap-on CT9175

The Snap-on CT9175 is the highest-torque and most expensive impact the brand has ever sold: $675 bare, $1,112 as a kit. It is based on the CT9080 half-inch platform, and Snap-on rates it at 1,250 foot-pounds with 1,550 foot-pounds of bolt breakaway. At 9.6 inches long it is toward the top of this class in size.

In testing it scored 631 foot-pounds on the 5-second forward test, then reached 758 foot-pounds in the best-case test with the new 5.6 amp-hour batteries, and 776 foot-pounds when retested with a standard 5 amp-hour pack, since the higher-capacity pack actually felt less punchy. Its 15-second best run landed at 885 foot-pounds, the strongest on the day at that point and the most powerful Snap-on impact to date. It is more comfortable and tamer than the half-inch CT980 it is based on, which makes it a sensible pick for committed tool-truck buyers within the Snap-on ecosystem.

Acropow 3/4-Inch Impact Wrench

The Acropow is the wildcard. It was bought for $130 bare and accepts Milwaukee M18 batteries (with a DeWalt-battery flavor also sold), a route that treats the tool almost like an air tool: buy the body and use the batteries you already own. Its marketing claims are bold, 1,600 foot-pounds tightening and 1,550 breakaway, the highest numbers seen on an Amazon impact page.

With a standard 5 amp-hour pack it managed 649 foot-pounds forward and 845 foot-pounds on the 15-second test, already respectable. But fed the same Milwaukee Forge pack used by the strongest M18 on the graph, it jumped to 987 foot-pounds on a calibrated dyno, passing every red pistol-grip impact tested to date, including Milwaukee’s current one-inch pistol. That makes it the most powerful Amazon impact tested and, oddly enough, the most powerful red 3/4-inch impact available including Snap-on and Milwaukee’s current offerings.

It placed second-best cordless 3/4-inch ever on the overall leaderboard, behind only a Makita that costs roughly three times as much, and set a new record for value in the category. The unknowns are real: long-term durability and warranty support for a no-name outfit are a toss-up, and it earned a 62% shortfall versus claimed tightening figures, though that is not unusual for its points range. Still, at $130 with M18 batteries already in hand, it is more than a value play; it is the performance target Milwaukee will have to beat.

Overall Buying Advice

The Acropow is the clear standout for anyone already holding M18 batteries, though its price has reportedly risen by about $130 since first testing, so check current listings before buying. The Snap-on CT9175 suits buyers already inside that dealer ecosystem who want the brand’s most capable impact yet. The Bosch ProFactor is the hardest to recommend: it performs like its own half-inch sibling and asks more money for the anvil.

Conclusion

If raw torque per dollar is the goal, the Acropow at $130 with M18 compatibility is hard to argue with. The Snap-on CT9175 is the refined, powerful flagship for existing Snap-on users. The Bosch ProFactor 3/4-inch simply does not add enough over the half-inch tool it shares its internals with, unless the 3/4-inch drive itself is what you need.