M18 BIW12 Impact Wrench

£99.95Body only · at Tooled Up · + £6.95 delivery · Available to order

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Milwaukee M18 BIW12-0 18V 1/2″ Square Impact Wrench (Body Only)

Impact Wrenches · Milwaukee M18

Milwaukee M18 BIW12-0 18V 1/2″ Square Impact Wrench (Body Only)

Name: Milwaukee M18 BIW12-0 18V 1/2″ Square Impact Wrench (Body Only)
Brand: Milwaukee
SKU: M18BIW12-0
Availability: BackOrder

240Nm1-speed1.2kg bare3 years (with registration)

Milwaukee M18 compact 1/2" impact wrench. 240Nm, 0–2,450rpm, 3,350ipm. 1.2kg bare (derived). Body only.

Adds it to My Tools, kept on this device

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Lowest price we track

£99.95at Tooled Up · + £6.95 delivery · Available to order

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Compare retailersTotal with delivery

Tooled Up Lowest£99.95 + £6.95 delivery · Available to order£106.90View ›

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240Nm

Max torque

1.2kg

Weight (bare)

1/2" Square

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.

Max torque240Nm

145Nm lowestMakita TW141Dhighest 1,700NmMakita TW002G

Impacts per minute3,350

1,890 lowestDeWalt DCF961highest 4,000Makita TW004G

Weight (bare)1.2kg

0.8kg lightestMakita TW161Dheaviest 3.5kgDeWalt DCF961

Max speed2,450rpm

1,200rpm lowestDeWalt DCF961highest 3,200rpmMakita TW004G

Compare it with: + Einhell TP-CW 18/350-C Li BL + Makita DTW700 + DeWalt DCF891 + Bosch Green UniversalImpactDrive 18V-350

Full specs

From Milwaukee's own documentation. Checked 26/09/2026. Report a spec error ›

Performance

Max torque240 Nm

Speed settings1

No-load speed0–2450

Impacts per minute3,350

Impact mechanismStandard

Voltage18V

Square drive1/2" Square

Physical & Build

Weight (bare)1.2 kg

Weight (with battery)1.9 kg

LED work light✓ Yes

Belt clip✓ Yes

Noise level94.1 dB(A) LpA / 105.1 dB(A) LwA

The verdictOur take

The M18 BIW12 is Milwaukee's compact brushed 1/2in wrench: 240Nm and 1.2kg bare, for general nut running rather than wheel nuts. The FUEL wrenches are the step up for real torque.

Powered by Milwaukee M18 · 11

All 11 batteries that fit this tool, smallest first. Kits and chargers ›

M18B2 2.0Ah · 36Wh 0.4kg 1.6kg from £56.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18HB3 3.0Ah · 54Wh 0.7kg 1.9kg from £64.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18B4 4.0Ah · 72Wh 0.7kg 1.9kg from £57.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18B5 5.0Ah · 90Wh 0.7kg 1.9kg from £59.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18B5-CR 5.0Ah · 90Wh 0.7kg 1.9kg from £87.95at Tooled Up + £6.95 delivery View at Tooled Up ›

M18HB5 5.0Ah 0.79kg 1.99kg No retailer price yet About this battery ›

M18HB5-CR 5.0Ah 0.79kg 1.99kg No retailer price yet About this battery ›

M18HB5.5 5.5Ah · 99Wh 1.1kg 2.3kg from £99.95at Tooled Up + £6.95 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.