AOBEN 21V Cordless Impact Wrench, 400N.m Max vs Protmex Cordless Impact Wrench, 900Ft-lbs 1/2"
Updated August 2026 — Protmex Cordless Impact Wrench, 900Ft-lbs 1/2" leads on noise level and torque.
The Protmex Cordless Impact Wrench outperforms the AOBEN model in power and versatility, making it a better choice for demanding tasks.
Why AOBEN 21V Cordless Impact Wrench, 400N.m Max is better
Price
AOBEN is significantly cheaper at $53.99.
Weight
AOBEN is lighter, making it easier to handle.
User-friendly
AOBEN is designed for light to moderate tasks.
Why Protmex Cordless Impact Wrench, 900Ft-lbs 1/2" is better
Torque
Protmex has a maximum torque of 900 ft-lbs.
Speed
Protmex reaches a maximum speed of 3500 RPM.
Battery Life
Protmex includes two 4.0Ah batteries for extended use.
Overall score
Specifications
| Spec | AOBEN 21V Cordless Impact Wrench, 400N.m Max | Protmex Cordless Impact Wrench, 900Ft-lbs 1/2" |
|---|---|---|
| Brand | AOBEN | Protmex |
| Max Torque | 400 N.m | 900 ft-lbs |
| Max Speed | 3000 RPM | 3500 RPM |
| Battery Type | 4.0Ah Li-ion | 2 x 4.0Ah Li-ion |
| Sales Rank | 46178 | 13737 |
Dimension comparison
Overview of the AOBEN 21V Cordless Impact Wrench
The AOBEN 21V Cordless Impact Wrench is designed for users looking for a powerful tool at a competitive price. Priced at $53.99, it sits comfortably within the market, making it an attractive option for both DIY enthusiasts and professionals. With a maximum torque of 400 N.m and a speed of 3000 RPM, this impact wrench promises efficiency in everyday tasks and small construction projects. Its lightweight design and ergonomic features ensure comfort during prolonged use, making it an excellent choice for those concerned with fatigue.
Overview of the Protmex Cordless Impact Wrench
The Protmex Cordless Impact Wrench offers a more powerful performance, with a torque rating of 900 ft-lbs (1200 N.m) and a maximum speed of 3500 RPM. At $85.49, it is about 58% more expensive than the AOBEN model. This impact wrench is particularly appealing to users who require a high-torque tool for demanding tasks, such as automotive repairs or heavy-duty construction. Additionally, it comes with two 4.0Ah batteries, providing extended battery life and reducing downtime during work.
Performance Comparison
In terms of performance, the Protmex features a brushless motor that enhances efficiency and longevity, allowing it to run 60.5% longer than traditional motors while producing less noise. The AOBEN, while powerful, is limited to a maximum torque of 400 N.m, which may be adequate for lighter tasks but falls short for more demanding applications. If sheer power is a priority, the Protmex's 900 ft-lbs makes it the superior choice, especially for users needing to tackle rusted or corroded nuts and bolts.
Battery and Charging Efficiency
The AOBEN comes with a 4.0Ah battery, which can be fully charged in a few hours, ensuring that users can get back to work quickly. However, the Protmex includes two 4.0Ah batteries, providing a significant advantage in battery life and convenience. This setup allows for continuous operation, as one battery can charge while the other is in use. Given that the Protmex is designed for heavy-duty tasks, the extra battery capacity can be a game-changer, especially in prolonged work scenarios.
Usability and Comfort
When it comes to usability, both models prioritize user comfort. The AOBEN features a lightweight design with a soft grip handle, which reduces fatigue during extended use. In contrast, the Protmex also includes a built-in LED light that enhances visibility in dark or cramped spaces, making it easier to work accurately in a variety of conditions. While both tools are designed with ergonomics in mind, the added features of the Protmex may make it the better option for those who frequently work in less-than-ideal environments.
Versatility in Application
The AOBEN is well-suited for daily household maintenance, motorcycle repairs, and small-scale construction projects. It comes with six driver sockets, making it versatile enough for a range of tasks. On the other hand, the Protmex is designed for a broader range of applications, including automotive repairs and agricultural machinery maintenance. Its higher torque and robust construction allow it to tackle more demanding jobs, making it the go-to choice for users who require a versatile tool for various heavy-duty applications.
Price Comparison
At $53.99, the AOBEN is about 37% cheaper than the Protmex, which is priced at $85.49. This price difference may be a deciding factor for budget-conscious consumers or those who only need an impact wrench for light to moderate tasks. However, for those who prioritize performance and versatility, the Protmex may justify the higher cost with its superior specifications and additional features.
Which should you buy?
Choosing between the AOBEN 21V Cordless Impact Wrench and the Protmex Cordless Impact Wrench ultimately depends on your specific needs. If you're seeking an affordable, user-friendly tool for light to moderate tasks, the AOBEN is an excellent choice. However, if you require higher torque and versatility for more demanding jobs, the Protmex provides the added power and features that may be worth the investment. Assess your typical use cases and budget to determine which impact wrench aligns best with your requirements.

