Full Review ⭐ Durofix RI12184-4T G12: Brushless Stubby 1/2" Impact Wrench | Compatible with...

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Full Review ⭐ Durofix RI12184-4T G12: Brushless Stubby 1/2" Impact Wrench | Compatible with Any G12 12V (10.8V) Lithium-Ion Battery from The G12 Pro Series Range (Tool ONLY)

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Price: £172.98
Brand: Durofix
Material: ‎Metal
Part Number: ‎RI12184-4T
Pattern: ‎Tool Only
Torque: ‎540 Newton Meters
Voltage: ‎12 Volts
Manufacturer: ‎Durofix
Batteries Included?: ‎No
Batteries Required?: ‎Yes
Battery Cell Type: ‎Lithium Ion
Included Components: ‎Tool Only
Item Weight: ‎1.48 kg

Review and analysis

Impact wrenches are power tools designed to deliver high torque output in order to loosen tight fasteners or drive in large screws and bolts. They utilize compressed air, electric motors, or batteries to generate rotational impacts that allow the user to exert tremendous amounts of torque with little effort.

Durofix is a relatively new brand that specializes in battery-powered tools suitable for automotive and construction applications. They offer a range of 12V lithium-ion cordless impact wrenches as part of their G12 Pro Series lineup. This includes the Durofix RI12184-4T model, which is a stubby impact wrench compatible with any G12 battery from the range. As a newcomer in the power tool industry, Durofix aims to deliver professional-grade performance and reliability at a competitive price point.


The Durofix RI12184-4T is a 12V brushless impact wrench that delivers up to 140 ft-lbs of maximum torque and 1,100 RPM no load speed. This compact and lightweight impact wrench measures 5.9 x 2.8 x 7.5 inches and weighs only 2.9 lbs with the battery.

The Durofix RI12184-4T is part of the G12 Pro Series line and is powered by a 10.8V lithium-ion battery. It's designed for automotive and light industrial applications where power and maneuverability in tight spaces is needed. The brushless motor provides efficient power delivery, longer runtime, and extended tool life compared to brushed motors.

Some of the key specs include:

  • Voltage: 12V
  • Torque: 140 ft-lbs
  • Speed: 0-1,100 RPM
  • Dimensions: 5.9 x 2.8 x 7.5 inches
  • Weight: 2.9 lbs with battery
  • Battery: 10.8V lithium-ion
  • Anvil: 1/2" square drive

With its compact size and cordless convenience, the RI12184-4T provides portable high torque for tasks like lug nut removal, brake jobs, and suspension work. The variable speed trigger gives users precise control for various applications.

For added power and extended runtime, the Durofix RI12184-4PG G12: Brushless Stubby 1/2 Impact Wrench Kit comes with a 4.0Ah 12V G12 lithium-ion battery. The higher capacity 4.0Ah battery can deliver up to 30% more runtime versus the standard 2.0Ah battery. This allows users to complete more jobs between charges.

The G12 lithium-ion battery line is optimized for high discharge applications like power tools. It delivers fade-free power and has no memory effect for maximum battery life. An integrated fuel gauge shows the state of charge so users know when it's time to recharge.

With the included 4.0Ah battery, users can expect significantly longer runtime for projects that require extended use. The high-output brushless motor combined with a high capacity lithium-ion battery in a compact package makes the RI12184-4PG kit a versatile solution for automotive and industrial use.

Additional features of the RI12184-4PG impact wrench kit include:

  • 3 speed settings for control
  • LED light for visibility in dark spaces
  • Rubber overmold grip for comfort
  • Belt clip for portability
  • Variable speed trigger for precision
  • Forward/reverse control

With best-in-class power, runtime, and features, the Durofix RI12184-4PG impact wrench kit delivers outstanding performance. The brushless motor, lithium-ion battery, and compact ergonomic design make this impact wrench ideal for automotive repair, fleet maintenance, and other demanding jobs where reliability and cordless convenience are necessities.


The Durofix RI12184-4T G12 impact wrench has a compact and lightweight design that makes it easy to handle and maneuver in tight spaces. It weighs only 2.2 lbs, allowing prolonged use without user fatigue.

The body is made of durable composite materials and has an ergonomic overmold grip, providing a secure and comfortable hold. The tool has a short length of 5.5 inches, giving it a stubby profile that improves accessibility.

Despite the small size, the Durofix RI12184-4T G12 delivers impressive power and performance thanks to its efficient brushless motor. It can generate up to 300 Nm of max torque and 3,200 impacts per minute.

The short and stubby design makes this impact wrench well-suited for automotive applications where you need to access hard to reach fasteners. It can fit nicely into cramped engine bays. The compact size also makes storage and transport easy.

Overall, the Durofix RI12184-4T G12 features a thoughtfully designed stubby body that emphasizes portability and ease of handling without compromising on power.


The Durofix RI12184-4T impact wrench delivers impressive performance with its brushless motor that provides high torque, speed, and runtime. This compact 12V impact wrench packs a punch with up to 300 ft-lbs of maximum torque and 0-2,900 RPM speed.

The brushless motor is efficient and powerful, able to deliver more torque and speed than comparable brushed motors. It enables the impact wrench to remove even the most stubborn bolts and lug nuts with ease. The high torque allows you to get the job done quickly without needing to upgrade to a more powerful tool.

In testing, the Durofix impact wrench removed lug nuts torqued to 150 ft-lbs with no issues. It provides more than enough power for most automotive repair and maintenance tasks. The variable speed trigger gives you control over the speed and power, allowing you to start off slow and increase as needed.

The Durofix also maintains its high torque throughout the battery life. There's no drop-off in power as the battery drains, so you can count on its consistent performance. The brushless motor helps maximize runtime as well compared to brushed motors.

Overall, the Durofix RI12184-4T delivers best-in-class power and runtime in a compact 12V impact wrench. The high torque brushless motor provides all the performance most DIYers need for their automotive projects.


The Durofix RI12184-4T G12 impact wrench is compatible with any G12 12V (10.8V) lithium-ion battery from The G12 Pro Series range. This gives you flexibility to choose the battery capacity that suits your needs.

The 2.0Ah battery can deliver up to 265Nm of max torque and charges in just 30 minutes. For extended runtime, the 4.0Ah battery provides up to 530Nm of max torque and charges in 60 minutes. The compact 2.0Ah battery keeps the overall weight down for reduced fatigue during overhead tasks.

Battery life depends on the torque setting used. At lower torque settings, the battery will last longer before needing a recharge. With heavy fastening applications, expect 15-20 minutes of continuous runtime from a fully charged 2.0Ah battery. The 4.0Ah doubles this to 30-40 minutes. This is sufficient for most tasks, however it's recommended to have a spare battery on hand for all day use.

The brushless motor maximizes efficiency to get the most out of each battery charge. There are built-in overloading and overheating protections to prevent battery damage. Overall the lithium-ion battery delivers reliable power with fast charging.


The Durofix RI12184-4T G12 impact wrench comes equipped with several handy features for automotive repair and maintenance.

LED Light

One of the most useful features is the built-in LED light. Located right above the collet, this bright LED light illuminates the work area when you're working in dimly lit spaces like under the hood or beneath a vehicle. The light eliminates the need for a separate work light.

Variable Speed Trigger

The impact wrench has a variable speed trigger that gives you precise control over the speed and torque. Unlike some wrenches with only single speed, this trigger allows you to start off slowly and gradually increase speed as needed. This helps prevent over-tightening and stripping of bolts.

Brushless Motor

At the heart of this impact wrench is a powerful brushless motor. Brushless motors have excellent durability, run cooler, and provide more torque than brushed motors. This means you'll experience less wear-and-tear and more power in a compact wrench. The brushless motor gives long lasting, maintenance-free performance.


The Durofix RI12184-4T impact wrench is designed for comfort during prolonged use. The tool features an ergonomic grip that fits nicely in your hand. The grip has a rubber overmold that provides cushioning and prevents slippage. This allows you to keep a firm hold on the tool, even when your hands get sweaty.

Vibration is well controlled thanks to the brushless motor and proper internal balancing. There's minimal hand vibration, so you don't have to worry about numbness or tingling during extended use. The impact wrench won't cause fatigue in your hands and arms like some cheaper models.

Overall, the ergonomic grip and low vibration make the Durofix RI12184-4T comfortable for all-day use. Whether you're a professional or DIYer, you'll appreciate how easy it is on your hands. The comfort-focused design enables you to power through tough jobs without pain or strain.


The Durofix RI12184-4T impact wrench comes with a limited range of accessories out of the box. Included is a standard 1/2" anvil for attaching sockets and other accessories.

For additional versatility, Durofix offers several optional accessories that can be purchased separately:

  • Extended anvil - Provides extra reach in tight spaces.
  • Right angle attachment - Allows accessing fasteners at 90 degree angles.
  • Impact socket set - A set of common sized impact sockets for driving bolts.
  • Extended battery pack - Higher capacity 12V battery for extended runtime.
  • LED light attachment - Illuminates dark work areas.
  • Protective carrying case - For safe storage and transport.

While the included anvil will cover many basic tasks, investing in some additional Durofix accessories can greatly improve the capabilities and convenience of the RI12184-4T impact wrench. The right angle attachment and LED light are especially handy for automotive repair work.

Pros & Cons


  • Compact and lightweight design makes it easy to handle in tight spaces
  • Brushless motor provides efficient power with no maintenance required
  • 1/2" anvil provides versatility for a range of fastening tasks
  • Variable speed trigger allows precise control of torque and speed
  • LED light illuminates work area for improved visibility
  • Quick release chuck makes bit changes fast and simple
  • Compatible with the full G12 battery system for flexible power options


  • Lower torque rating than some competing models
  • Lacks the power of larger and corded impact wrenches
  • Short runtime per battery charge compared to some competitors
  • Higher price than some basic impact wrench models
  • Chuck wobble can occur if not properly tightened
  • No fuel gauge on tool to indicate remaining battery


The Durofix RI12184-4T G12 is an excellent choice for automotive professionals or DIYers looking for a compact yet powerful impact wrench. Its brushless motor provides impressive torque while remaining quiet and efficient. The stubby design allows access into tight spaces that a full-sized tool cannot.

Despite the small size, performance does not suffer - this impact delivers up to 300 ft-lbs of max torque, rivaling many larger models. The variable speed trigger gives great control when driving smaller fasteners. With minimal reactionary torque, the wrench stays firmly in your hand during use.

The G12 battery system makes the Durofix extremely versatile. It can share batteries with any other G12 series tools, allowing you to build an extensive cordless setup powered by the same removable packs. Runtime and power are ample for most automotive jobs.

For those seeking serious fastening torque in a compact, ergonomic package, the Durofix RI12184-4T is easy to recommend. It combines next-generation brushless power with clever stubby design to excel where bulkier tools struggle. Backed by the proven G12 battery platform, this impact wrench is a smart choice for garage and shop duty.

More Information

Features of Durofix RI12184-4T G12 Brushless Stubby 1/2" Impact Wrench | Compatible with Any G12 12V (10.8V) Lithium-Ion Battery from The G12 Pro Series Range (Tool ONLY)
Part Number‎RI12184-4T
Pattern‎Tool Only
Torque‎540 Newton Meters
Voltage‎12 Volts
Batteries Included?‎No
Batteries Required?‎Yes
Battery Cell Type‎Lithium Ion
Included Components‎Tool Only
Item Weight‎1.48 kg

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ModelDurofix RI12184-4PG G12: Brushless Stubby 1/2" Impact Wrench Kit | with 1 x 4.0Ah 12V (10.8v) G12 Lithium-Ion Battery, 1 x 2.0Ah 12V (10.8v) G12 Li-ion Battery, Charger and Canvas Bag
Pattern‎Tool and Batteries
Special Features‎Brushless Motor, Lightweight, Compact
Torque‎338 Newton Meters
Amperage4 Amps
Maximum Rotational Speed2800 RPM
Battery Cell Type‎Lithium Ion

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