Astro Pneumatic Tool 1822 ONYX 1/2" Nano Impact vs Protmex 1107Ft-lbs Cordless Impact Wrench, 1/2"
Updated August 2026 — Astro Pneumatic Tool 1822 ONYX 1/2" Nano Impact wins on weight, Protmex 1107Ft-lbs Cordless Impact Wrench, 1/2" wins on led light and battery life.
The Protmex 1107Ft-lbs offers higher torque and cordless convenience, making it the better choice for heavy-duty tasks.
Why Astro Pneumatic Tool 1822 ONYX 1/2" Nano Impact is better
Compact Size
Astro Pneumatic Tool is shorter at less than 3-7/8 inches.
Lightweight
Astro Pneumatic Tool weighs only 3.0 lbs.
Versatile Settings
Astro Pneumatic Tool has 3 forward and 3 reverse settings.
Why Protmex 1107Ft-lbs Cordless Impact Wrench, 1/2" is better
Higher Torque
Protmex delivers 1107 ft-lbs of torque.
Cordless Design
Protmex offers mobility without air compressor.
Brushless Motor
Protmex features a high-efficiency brushless motor.
Overall score
Specifications
| Spec | Astro Pneumatic Tool 1822 ONYX 1/2" Nano Impact | Protmex 1107Ft-lbs Cordless Impact Wrench, 1/2" |
|---|---|---|
| Max Torque | 500 ft-lbs | 1107 ft-lbs |
| Power Source | Air | Cordless |
| Motor Type | Twin Hammer | Brushless |
| Weight | 3.0 lbs | 5.0 lbs |
| Speed Settings | 3 | 3 |
Dimension comparison
Overview of the Products
The Astro Pneumatic Tool 1822 ONYX 1/2" Nano Impact Wrench is priced at $111.99, while the Protmex 1107Ft-lbs Cordless Impact Wrench is slightly cheaper at $109.97, making it about 1.8% less expensive. Both tools are designed for high torque applications but cater to different user needs and preferences. The Astro Pneumatic Tool is a pneumatic impact wrench, while the Protmex is a cordless model, each presenting unique advantages in terms of portability and power source.
Design and Build Quality
In terms of design, the Astro Pneumatic Tool features an industry-leading short profile, measuring less than 3-7/8 inches long. This compact size, combined with a lightweight build of just 3.0 lbs, makes it highly maneuverable in tight spaces. On the other hand, the Protmex is designed as a cordless unit, which adds convenience and mobility but comes with a larger overall size due to its battery system. While both tools are well-built, the Astro's compact design is particularly advantageous for users who frequently work in confined areas.
Performance Metrics
The Astro Pneumatic Tool delivers a maximum torque of 500 ft-lbs, which is significant for many applications. In contrast, the Protmex boasts a maximum torque output of 1107 ft-lbs (or 1500 Nm), providing an impressive advantage in power. This means the Protmex is potentially better suited for heavy-duty tasks, such as loosening stubborn bolts or working on larger vehicles. Users looking for sheer torque may find the Protmex's specifications more appealing, while those needing a more compact solution might prefer the Astro.
Motor Efficiency
The Astro Pneumatic Tool features a high-performance motor and an innovative twin hammer design, which contributes to its reliability and efficiency. The Protmex utilizes a high-efficiency brushless motor that allows it to reach a maximum speed of 2300 RPM, ensuring faster work completion. Brushless motors typically offer longer runtimes and less maintenance compared to traditional motors, enhancing the Protmex's performance in continuous use scenarios.
Battery and Power Source
The Protmex operates on a rechargeable 21V battery system, which includes two 4.0Ah battery packs. This setup allows for extended use without the need for constant recharging. In contrast, the Astro Pneumatic Tool is an air-powered tool that requires an air compressor, which may limit its portability in certain situations. Users who prioritize flexibility and less dependence on external power sources may lean towards the Protmex for its cordless capabilities.
User Experience and Ease of Use
The Astro Pneumatic Tool features three forward and three reverse settings, allowing for versatile applications and improved user control. Its lightweight build provides a comfortable experience during extended use. Meanwhile, the Protmex includes features such as a built-in high-brightness LED light, which enhances visibility in dimly lit work conditions. The Protmex also has a two-way braking system for added safety, making it a user-friendly option for those who may be less experienced with impact wrenches.
Application Versatility
The Astro Pneumatic Tool excels in applications that require precise torque in tight spaces, making it ideal for automotive repair and delicate assembly tasks. Conversely, the Protmex is designed for a broader range of applications, including heavy-duty tasks like disassembling tires from vehicles and agricultural machinery. Its versatility makes it suitable for both professional mechanics and DIY enthusiasts who tackle a variety of projects.
Which should you buy?
Choosing between the Astro Pneumatic Tool 1822 ONYX and the Protmex 1107Ft-lbs ultimately depends on your specific needs and preferences. If you prioritize compactness, light weight, and the ability to work in tight spaces, the Astro Pneumatic Tool is an excellent choice. However, if you require higher torque output and the convenience of a cordless design, the Protmex stands out as the better option, especially considering its impressive 1107 ft-lbs of torque. Both tools have their merits, but understanding your typical use case will guide you toward the right decision.

