Excellent at loosening, and never the tool that finishes the job · review
The lightest and shortest tool here at 1.70 kg (3.7 lb), with four impact sockets and a record claim the shelf disproves.
The last word Bought for 1.70 kg (3.7 lb) and 5.9 inches, which is what you feel under a wing. Its "market’s highest torque" claim is contradicted twice on its own shelf.
A 1/2-inch brushless cordless impact wrench stating 590 ft-lb / 800 N·m maximum torque, three speeds at 0–2000 / 2200 / 2800 rpm, a reverse auto-stop, an LED that stays on about 20 seconds, 3.74 lb (1.70 kg) with a battery and 5.9 inches front to back, with two 4.0 Ah batteries, a 1-hour charger, four impact sockets (17, 19, 21, 24 mm (0.94 in)), four rubber rings, a belt clip and a case. 120 × 80 × 70 mm (4.72 × 3.15 × 2.76 in). $89.99.
“weighs only 3.74 lbs with a battery, its compact design (5.9 inches front to back).”
The introduction puts this third among its criteria and explains why: “the third is weight, because this is held at arm’s length under a wing.”
| Tool | Stated weight | Stated length |
|---|---|---|
| This tool | 3.74 lb (1.70 kg) | 5.9 in |
| DCA ADPB520 | 4.4 lb (2.0 kg) | 6 in |
| Dong Cheng, published | 2.2 kg (4.9 lb) | — |
| MAGSEN | 10 lb (4.5 kg) | 16 in |
| DEWALT · Bosch · Einhell · KS Tools · VEVOR air | not published | — |
One point seven kilograms at a stated 800 N·m is the best weight-to-torque ratio published on this shelf, and 5.9 inches is the figure that decides whether the tool goes between a disc and a wishbone at all.
Robustrue draws the conclusion itself: “friendly for women and elderly users”. Phrased differently, a 4.5 kg (9.9 lb) tool held overhead for four wheel nuts is a different job from a 1.7 kg (3.7 lb) one, and that is the whole of what this tool sells.
“Impact wrench delivers a maximum torque of 590 ft-lbs (800N.m), making it the market’s highest torque battery-powered cordless impact wrench.”
On this shelf:
Three listings, three claims, and the highest of them is not this one. All three figures are published by their makers and none is verified here.
The introduction is worth rereading at this point: “Comparing one brand’s breakaway figure with another’s fastening figure is the most common mistake on this shelf.” Robustrue publishes a single “maximum torque” without saying which of the two it is, which is the ambiguity the warning is about. If 800 N·m is a loosening figure, the comparable DEWALT number is 1,898 N·m; if it is a fastening figure, the comparable number is 1,396 N·m. Either way the claim does not hold on this shelf.
“supports 3 speeds from 0-2000/2200/2800RPM adjustment to meet different working demands, improve efficiency, and save battery power.”
Revolutions are not torque. A selector that changes speed changes how fast the hammer strikes, and the torque that results depends on the setting, the battery state and the fastener.
| Tool | Stages | Published per stage |
|---|---|---|
| DCA ADPB520 | 4 | 350 / 420 / 520 N·m + 682 |
| MAGSEN | 3 | 500 / 800 / 1200 N·m with 1800 / 2800 / 3800 rpm |
| Dong Cheng, published | 3 | 431 and 507 N·m among them |
| This tool | 3 | rpm only |
| DEWALT | 4 | none |
MAGSEN publishes both figures for each of its three stages, which is the full version. This publishes half of it, and the published DEWALT publishes neither.
“In reverse mode, once the nut or bolt is loosened, the brake stop device will activate and reduce speed and torque to prevent the nut from falling off and protecting the bolt thread.”
That is the same idea as DCA’s Smart Loosen, DEWALT’s protection against “fastener run-off” and the published Bosch wrench’s automatic slow-down. Four of the nine tools here publish it in some form, and it is the most practically useful piece of electronics on the shelf: a gun that keeps hammering after a nut is free spins it off the stud and chews the first threads on the way.
“4x Impact Wrench Sockets (17mm (0.67 in), 19mm (0.75 in), 21mm (0.83 in), 24mm (0.94 in)), 4x Rubber Rings.”
The buying advice at the top of this shelf: “use impact sockets, not chrome ones. Chrome sockets are hardened to resist wear, not shock, and they fail by shattering rather than by deforming.”
Two tools on this shelf supply them: this with four and MAGSEN with five. The DEWALT and DCA wrenches and all five published tools supply none, which means a chrome set from this site’s socket sets shelf is the wrong thing to reach for and an impact set is a separate purchase — the WETT 50-piece set on that shelf is the only impact set there.
17, 19, 21 and 24 mm covers most European and Asian wheel nuts. MAGSEN adds 22 mm.
“The Robustrue Impact Wrench also serves as an impact drill and screwdriver, making it versatile.”
A 1/2-inch square drive does not take a drill bit or a screwdriver bit without an adapter, and none is listed in the contents. What the claim means is that the mechanism will drive an adapter; what it does not mean is that an 800 N·m impact mechanism is a sensible screwdriver. A screw driven by a hammering gun is a screw with a stripped head.
No fastening or breakaway split — one “maximum torque” figure for both. No torque per speed stage. No impacts per minute. No anvil type, where the DEWALT and DCA tools both publish a hog ring. No bolt size range, where DCA publishes M12–M20. No platform range — what other tools take this battery is not stated. No warranty term.
At $89.99 with two batteries and four impact sockets it is the one to hold at arm’s length, and its headline claim is the one to discount.
On sale at around $90 on the American Amazon store at the time of checking.
Prices and availability are what Keepa reported on the date this page was updated; both move.
Prices quoted in this text were read on 6 October 2026. The live price is at the top of the page.
| Maximum torque | 590 ft-lb / 800 N·m stated, without saying fastening or breakaway |
|---|---|
| Speeds | 3 — 0–2000 / 2200 / 2800 rpm; no torque per stage |
| Weight | 3.74 lb (1.70 kg) with battery — the lightest stated figure here |
| Length | 5.9 in front to back |
| Reverse | Auto-stop brake that cuts speed and torque once the nut frees |
| Supplied | 2 × 4.0 Ah batteries, 1-hour charger, 4 impact sockets, belt clip, case |
| Socket sizes | 17, 19, 21, 24 mm (0.94 in) |
| LED | Stays lit about 20 seconds after the trigger |
| Other uses | Stated as impact drill and screwdriver; no adapter listed |
| Anvil type | NOT PUBLISHED |
| Impacts per minute | NOT PUBLISHED |
| Platform range | NOT PUBLISHED |
| Amazon reference | B0CGJ8H8K7 |
| EAN | 0199874966557 |
Not on this shelf. Robustrue states 800 N·m; MAGSEN states 1,200 N·m and DEWALT states 1,400 ft-lb (1,898 N·m) of breakaway, both battery-powered and cordless. All three are maker figures and none is verified here. Robustrue also does not say whether its 800 N·m is a fastening or a breakaway number, which is exactly the ambiguity the shelf’s introduction warns about.
How fast the hammer strikes — 2000, 2200 and 2800 rpm — and not a stated torque. Revolutions are not newton-meters, so the torque at each setting depends on the fastener and the battery. MAGSEN on this shelf publishes both figures for each stage (500/800/1200 N·m against 1800/2800/3800 rpm), and DCA publishes a torque for each of its four modes.
Yes, and that is why they matter. The buying advice for this shelf is blunt: "use impact sockets, not chrome ones. Chrome sockets are hardened to resist wear, not shock, and they fail by shattering." Only this tool and MAGSEN supply any on this shelf. The four here are 17, 19, 21 and 24 mm (0.94 in); anything else means buying an impact set, and on this site’s socket sets shelf there is exactly one.
Details checked on October 6, 2026.
Overhead and wheel-arch work, where 1.70 kg (3.7 lb) is the specification that counts
Amazon reports what buyers took in the month before this page was last checked: at least 700.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet for garage tools and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
Cordless 18 V · 215 Nm stated · 3300 rpm · two automatic modes · auto shut-off and slow-down · belt clip
The compact one: 215 Nm and 3300 rpm on the 18 V Professional platform, with automatic modes that slow and stop the tool rather than hammering on.
Best for: Someone already on the Bosch Professional platform who wants a compact tool for general work.
≈ $335
520 N·m fastening / 682 N·m loosening, both stated · 4 modes at 350/420/520 + 682 · hog ring · 2 × 4.0 Ah included · 2.0 kg (4.4 lb)
Both torque figures, a torque published for every mode, two 4 Ah batteries — at the lowest price on this shelf.
Best for: A first cordless wrench, bought on published numbers rather than a brand
1030 ft-lb fastening / 1400 ft-lb breakaway, both stated · 4 modes · hog ring anvil · 20V MAX · tool only
The highest cordless torque here, with fastening and breakaway published separately — and no battery in the box.
Best for: A garage that already owns 20V MAX batteries and meets seized suspension bolts
