Best Right Angle Impact Wrench: 5 Compared for Tight Spaces

Compare the picks

Specifications are manufacturer rated, as published on each listing and collected 22 October 2026. Where a listing gives no figure, the table says so.

22 October 2026

How we scored them

Each wrench is scored on performance, build, value, safety and warranty, with the weights published on our How We Pick page. None of the five states a UL, ETL or CSA listing, so all score zero on safety, and none states a clear warranty term.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

What the listings tell you

Five right angle impact wrench listings were compared: four cordless and one air-powered. Stated torque runs from 60 ft-lb to 415 ft-lb. The cordless examples run on 20V, M12 and M18 batteries; two are sold as bare tools with no battery or charger. Drive sizes are 3/8 inch on two picks and 1/2 inch on three. Listed weights run from 2 pounds to 3.3 pounds, and stated lengths from 3.46 inches to 14.5 inches. Only the AOBEN kit includes sockets and a case; only the Astro needs a compressor, whose size the listing does not state.

Drive size splits the field: the two 3/8 inch picks suit smaller fasteners, while the three 1/2 inch picks handle bigger hardware. Only the AOBEN states a speed range, 0-2250 RPM, and only the 2668-20 is described as 2-speed. Lengths run from the 3.46 inch Astro nano to the 14.5 inch Milwaukee, so the range covers everything from buried bolts to open engine bays.

Battery inclusion is the detail to watch: the AOBEN kit includes two 20V 2.0Ah batteries, while the Milwaukee 2565-20 and 2668-20 are bare tools with no battery or charger. The Milwaukee 2564-20 does not state whether a battery is included, so confirm before buying. None of the five listings states a warranty term or a safety listing, which is common for tools at this end of the market. Speed control also varies: the AOBEN states a 0-2250 RPM variable trigger and the 2668-20 is a 2-speed, while the others state no speed figures.

Buying guide: best right angle impact wrench

Match the torque to the job

Breakaway torque is the number that matters, and the listings state it plainly: 60, 135, 220 and 415 ft-lb across the five picks. Engine bay fasteners and interior work suit the lower end; suspension and exhaust hardware want the higher end. Do not confuse working torque with breakaway torque; the listings here state a single torque figure, so compare them as stated.

Cordless or air

Four of the five picks are cordless, which means grabbing the tool and going. The Astro is the only air-powered pick, and it delivers the highest torque here at 415 ft-lb in the smallest body. Air means a compressor, hoses and couplers; cordless means batteries to keep charged. The AOBEN kit is the only pick that includes batteries in the box.

How the listings describe tight-space use

Every listing here sells on access: the AOBEN names engine compartments, the Astro’s 3.46 inch body speaks for itself, and the Milwaukee picks state 90-degree heads for tight spaces. If the spec sheet gives no length, as with the AOBEN, assume nothing and measure the job first.

Drive size and access

The 3/8 inch drive picks suit smaller fasteners and tighter spots, while the 1/2 inch picks handle bigger hardware. Length matters as much as drive: the Astro at 3.46 inches reaches where the 14.5 inch Milwaukee cannot, but the longer tools give more leverage and a better grip. Measure the tightest spot in the job before choosing.

Bare tool or kit

Two Milwaukee picks are bare tools, which is good value for owners already on the M12 or M18 platform and a trap for everyone else. The AOBEN kit includes two batteries, six sockets and a case, so a first-time buyer starts complete. Add the battery and charger cost to any bare tool before comparing.

Check the battery platform

The cordless picks span three platforms: 20V on the AOBEN, M12 on two Milwaukees and M18 on one. Batteries do not cross platforms, so an existing collection decides the pick as much as the specs. The Milwaukee 2564-20 listing does not state battery inclusion, so confirm before buying.

Weight and balance

Right angle work is often overhead or one-handed, so weight matters: the picks run from 2 pounds to 3.3 pounds. The Astro is both the strongest and the lightest, while the longer Milwaukee picks trade a few ounces for reach. The AOBEN kit states no weight, which is worth checking since the two batteries and case add up.

What the box should include

Only the AOBEN includes sockets, with six from 10 to 17 mm, and it is the only pick with a carry case. The bare Milwaukee picks include the wrench alone, so budget for the right drive sockets separately. The Astro includes the wrench alone as well, plus the air fittings the shop already has.

Garage Fit Check

• Power: four picks are cordless on 20V, M12 or M18 batteries; the Astro needs shop air, and its listing states no compressor size.
• Space: the longest pick is 14.5 inches and the shortest 3.46 inches; check the tightest fastener before choosing.
• Storage: only the AOBEN includes a carry case; the bare tools need a spot in the toolbox.
• Sockets: only the AOBEN includes sockets (10 to 17 mm); the other picks need the right drive sockets on hand.

Frequently Asked Questions

How much torque does an air impact wrench have?

The air-powered pick here, the Astro 1832, is rated at 415 ft-lb. The cordless picks range from 60 to 220 ft-lb: the AOBEN at 135, both 220 ft-lb Milwaukees in the middle, and the 60 ft-lb 2668-20 at the bottom. Torque needs vary by job; match the rating to the fasteners, not the marketing.

Will a 20 gallon air compressor run an impact wrench?

It depends on the tool’s air consumption, which the Astro listing does not state. A 20 gallon tank gives a decent reserve for intermittent use, but the check that matters is the wrench’s requirement from its manual against the compressor’s rated output. Buy the compressor for the hungriest tool in the garage, not just this one.

Will a 6 gallon air compressor run an impact wrench?

Possibly for short bursts, but a 6 gallon tank drains fast under an impact wrench. The Astro listing states no air consumption figure, so check the tool manual against the compressor’s rated output. Expect frequent pauses while the tank recovers on a small compressor.

Will a 30 gallon air compressor run an impact wrench?

Usually yes for intermittent use: 30 gallons is a comfortable reserve for an impact wrench. Even so, the Astro listing states no consumption figure, so the manual’s requirement against the compressor’s rated output is the check that matters before assuming it will keep up.

How does an air impact wrench work?

Compressed air drives a motor that spins a hammering mechanism, delivering rapid rotational impacts to the fastener instead of steady torque. Each impact hits harder than a hand tool can, which is why an air wrench breaks loose bolts that a ratchet cannot move. Cordless impact wrenches use the same hammering idea with an electric motor.

Related: air tools and our best air impact wrench for beginners guide.