Specs from the makers' own documentation Battery compatibility built in UK retailer prices, updated daily 25+ years of trade experience
‹ Impact Wrenches
18V XR · Brushless DeWalt DCF921N-XJ 18V XR Brushless 1/2″ Hog Ring Compact Impact Wrench (Body Only)
Impact Wrenches · DeWalt 18V XR

DeWalt DCF921N-XJ 18V XR Brushless 1/2″ Hog Ring Compact Impact Wrench (Body Only)

406Nm4-speed + Precision1.1kg bare3 years (with registration)

18V XR brushless 1/2in compact impact wrench, hog ring. 406Nm fastening, 610Nm breakaway, 4 modes including Precision Wrench and Scaffolding, 0–2,500rpm, 0–3,550ipm. 1.1kg bare. Body only.

Adds it to My Tools, kept on this device
How do you want it?4 ways to buy · tap one to see what's in the box
Lowest price we track
£149.95at Tooled Up · + £5.95 delivery
Compare retailersTotal with delivery
Tooled Up Lowest£149.95 + £5.95 delivery£155.90View ›
My Tool Shed£149.95 + £5.95 delivery£155.90View ›
Machine Mart£199.99 + £4.99 delivery£204.98View ›
Prices from UK retailer feeds, updated daily.We may earn a commission
406Nm
Max torque
610Nm
Breakaway torque
1.1kg
Weight (bare)
1/2" Square (hog ring)
Square drive

Where it sits among 1/2" drive impact wrenches

Scaled against the 33 impact wrenches with a 1/2" drive we list, so other sizes aren't in the mix. Not a score: bigger isn't always better for your job.

Breakaway torque610Nm
215Nm lowestEinhell TP-CW 18 Li BLhighest 2,372NmDeWalt DCF961
Max torque406Nm
145Nm lowestMakita TW141Dhighest 1,700NmMakita TW002G
Impacts per minute3,550
1,890 lowestDeWalt DCF961highest 4,000Makita TW004G
Weight (bare)1.1kg
0.8kg lightestMakita TW161Dheaviest 3.5kgDeWalt DCF961

Full specs

From DeWalt's own documentation. Checked 25/09/2026. Report a spec error ›

Performance

Max torque406 Nm
Breakaway torque610 Nm
Torque settings4 modes: Precision Wrench Scaffolding Speed 1 Speed 2; breakaway 610 Nm
Speed settings4
No-load speed0–1400 / 2500
Impacts per minute3,550
MotorBrushless
Impact mechanismStandard
Precision / Assist mode✓ Yes
Voltage18V
Square drive1/2" Square (hog ring)

Physical & Build

Weight (bare)1.1 kg
Weight (with battery)1.71 kg
LED work light✓ Yes
Noise level97 dB(A) LpA / 108 dB(A) LwA
Vibration13 m/s²
The verdictOur take

The DCF921 is a compact 1/2in wrench aimed squarely at scaffolders: 406Nm, 610Nm breakaway, 1.1kg bare and a Scaffolding mode that runs the nut down and stops before over-tightening. It is too light for seized wheel nuts; for those look at the DCF891.

Powered by DeWalt 18V XR · 12

All 12 batteries that fit this tool, smallest first. Kits and chargers ›

DCBP034 1.7Ah · 30.6Wh 0.32kg 1.42kg from £78.95at Tooled Up + £5.95 delivery View at Tooled Up ›
DCB183 2.0Ah · 36Wh 0.4kg 1.5kg from £44.95at Tooled Up + £5.95 delivery View at Tooled Up ›
DCBP318 3.5Ah · 63Wh 0.58kg 1.68kg from £99.95at Tooled Up + £5.95 delivery View at Tooled Up ›
DCB182 4.0Ah · 72Wh 0.61kg 1.71kg from £49.95at Tooled Up + £5.95 delivery View at Tooled Up ›
DCB184 5.0Ah · 90Wh 0.62kg 1.72kg from £59.95at Tooled Up + £5.95 delivery View at Tooled Up ›
DCB184B 5.0Ah · 90Wh 0.62kg 1.72kg No retailer price yet About this battery ›
DCBP518 5.0Ah · 90Wh 0.75kg 1.85kg from £122.95at Tooled Up + £5.95 delivery View at Tooled Up ›
DCB546 6.0Ah · 108Wh · via DeWalt 18V/54V FlexVolt 1.08kg 2.18kg from £99.95at Tooled Up + £5.95 delivery View at Tooled Up ›

Tool weight worked out by adding each pack's weight to the bare tool, using the makers' figures. The maker's own with-battery figure can differ slightly. We may earn a commission on retailer links.

Warranty · 3yr

Up to 3 years1 year as standard, 3 once you register it with DeWalt
Register with DeWalt ›
Register within 28 days of buying Own one? Add it to My Tools and we'll remind you before the 28 days run out

Register within 4 weeks. Batteries/chargers excluded (PowerStack eligible). Nailers and other fastening tools are excluded and keep 1 year. Kit tools registered individually.

Warranty terms are set by the maker and can change. Always confirm current cover on their site before you buy.

Scroll to Top