Main
Product type	impact wrench
Design	gun


Specs
Rotation speed	400/1200/2000 rpm
Max. beats	2600 bpm
Torque	949 Nm
Reducer	1-speed
Number of speeds	3
Reverse	slider
Weight	2.66 kg


Chuck
Chuck type	square drive
Square size	1/2 "

Features
Features	impact mode brushless motor backlight
In box	charger


Power supply
Power source	battery
Battery in set	3
Battery platform	Stanley FatMax V20
Battery voltage	18 В
Battery capacity	4 Ah
Battery type	SFMCB204
Compatible batteries	SFMCB201, SFMCB202, SFMCB204, SFMCB206
Added to E-Catalog	August 2026

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.

Drill chuck: types and differencesSpecifics of different types of chucks for drilling and working with fasteners

Which is better: drill, screwdriver or drill-driver?We study the design features and specifics of the use of such similar, but still different types of power tools

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	Stanley Fatmax V20 SFMCF940 18v Cordless Brushless High Torque 1/2" Impact Wrench 3 x 4ah Li-ion Charger No Case SFMCF940M3 The SFMCF940 is a cordless high torque impact wrench which is part of the Stanley FatMax V20 battery system. It can be used with any Stanley FatMax V20 battery and shares battery compatibility with an ever growing range of additional tools. This impact wrench has a 1/2" anvil which is suitable for direct connection of 1/2" drive impact sockets. The... morepowerful brushless motor can deliver an impressive 929Nm of fastening torque, but to make it more suitable for lighter jobs as well it features three different modes which allow the speed and torque to be adjusted to the application in hand. Features and Benefits bull; Part of the Stanley FatMax V20 cordless system • Runs on any Stanley FatMax V20 battery • 1/2" Square drive anvil for direct connection of impact sockets • Maximum fastening torque of 929Nm • Integrated LED worklight • Oil, chemical and impact resistant glass fibre reinforced nylon housing • Rubberised handle for comfortable grip • Three mode settings to adjust the power output according to the application • Robust build quality: designed for jobsite environments Specifications • Battery Voltage: 18v • Battery Type: Stanley FatMax V20 (lithium ion) • Motor: Brushless • Square Drive: 1/2" • Modes: 3 • No Load Speed: 0-450 RPM /0 - 1200 RPM / 0 -2000 RPM • Maximum Impacts per Minute: 2600 • Maximum Fastening Torque: 929Nm • Tool Weight (excluding battery): 3.0kg Contents • Stanley FatMax V20 Cordless High Torque Impact Wrench • Stanley FatMax V20 Lithium Ion Battery 4ah (x3) • Battery Charger • No Case Mytoolshed.co.uk Delivery: in United Kingdom Report	£259.95 Buy in shop

	Stanley Fatmax V20 SFMCF940 18v Cordless Brushless High Torque 1/2" Impact Wrench 3 x 4ah Li-ion Charger No Case SFMCF940M3 The SFMCF940 is a cordless high torque impact wrench which is part of the Stanley FatMax V20 battery system. It can be used with any Stanley FatMax V20 battery and shares battery compatibility with an ever growing range of additional tools. This impact wrench has a 1/2" anvil which is suitable for direct connection of 1/2" drive impact sockets. The... morepowerful brushless motor can deliver an impressive 929Nm of fastening torque, but to make it more suitable for lighter jobs as well it features three different modes which allow the speed and torque to be adjusted to the application in hand. Features and Benefits bull; Part of the Stanley FatMax V20 cordless system • Runs on any Stanley FatMax V20 battery • 1/2" Square drive anvil for direct connection of impact sockets • Maximum fastening torque of 929Nm • Integrated LED worklight • Oil, chemical and impact resistant glass fibre reinforced nylon housing • Rubberised handle for comfortable grip • Three mode settings to adjust the power output according to the application • Robust build quality: designed for jobsite environments Specifications • Battery Voltage: 18v • Battery Type: Stanley FatMax V20 (lithium ion) • Motor: Brushless • Square Drive: 1/2" • Modes: 3 • No Load Speed: 0-450 RPM /0 - 1200 RPM / 0 -2000 RPM • Maximum Impacts per Minute: 2600 • Maximum Fastening Torque: 929Nm • Tool Weight (excluding battery): 3.0kg Contents • Stanley FatMax V20 Cordless High Torque Impact Wrench • Stanley FatMax V20 Lithium Ion Battery 4ah (x3) • Battery Charger • No Case Tooled-up.com Delivery: to United Kingdom Report	£259.95 Buy in shop

	Stanley Fatmax V20 SFMCF940 18v Cordless Brushless High Torque 1/2" Impact Wrench SFMCF940M3 The SFMCF940 is a cordless high torque impact wrench which is part of the Stanley FatMax V20 battery system. It can be used with any Stanley FatMax V20 battery and shares battery compatibility with an ever growing range of additional tools. This impact wrench has a 1/2" anvil which is suitable for direct connection of 1/2" drive impact sockets. The... morepowerful brushless motor can deliver an impressive 929Nm of fastening torque, but to make it more suitable for lighter jobs as well it features three different modes which allow the speed and torque to be adjusted to the application in hand. Features and Benefits bull; Part of the Stanley FatMax V20 cordless system • Runs on any Stanley FatMax V20 battery • 1/2" Square drive anvil for direct connection of impact sockets • Maximum fastening torque of 929Nm • Integrated LED worklight • Oil, chemical and impact resistant glass fibre reinforced nylon housing • Rubberised handle for comfortable grip • Three mode settings to adjust the power output according to the application • Robust build quality: designed for jobsite environments Specifications • Battery Voltage: 18v • Battery Type: Stanley FatMax V20 (lithium ion) • Motor: Brushless • Square Drive: 1/2" • Modes: 3 • No Load Speed: 0-450 RPM /0 - 1200 RPM / 0 -2000 RPM • Maximum Impacts per Minute: 2600 • Maximum Fastening Torque: 929Nm • Tool Weight (excluding battery): 3.0kg Contents • Stanley FatMax V20 Cordless High Torque Impact Wrench • Stanley FatMax V20 Lithium Ion Battery 4ah (x3) • Battery Charger • No Case Tooled-up.com Delivery: to United Kingdom Report	£259.95 Buy in shop

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Stanley FatMax SFMCF940M3 configurations


Stanley FatMax SFMCF940M1	from £199.95	2 offers
Stanley FatMax SFMCF940M2	from £229.95	3 offers
Stanley FatMax SFMCF940M3	from £259.95	3 offers
Stanley FatMax SFMCF940B	from £151.95	3 offers

Stanley FatMax SFMCF940M3

Buy Stanley FatMax SFMCF940M3

Stanley Fatmax V20 SFMCF940 18v Cordless Brushless High Torque 1/2" Impact Wrench 3 x 4ah Li-ion Charger No Case SFMCF940M3

Stanley Fatmax V20 SFMCF940 18v Cordless Brushless High Torque 1/2" Impact Wrench 3 x 4ah Li-ion Charger No Case SFMCF940M3

Stanley Fatmax V20 SFMCF940 18v Cordless Brushless High Torque 1/2" Impact Wrench SFMCF940M3

Stanley FatMax SFMCF940M3 configurations