DCK 9.0 Amp Angle Grinder, 4-1/ vs DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder,
Updated July 2026 — DCK 9.0 Amp Angle Grinder, 4-1/ wins on speed, DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, wins on power and price.
The DCK 9.0 Amp Angle Grinder offers excellent value and speed, while the DEWALT model provides advanced features and battery compatibility for professionals.
Why DCK 9.0 Amp Angle Grinder, 4-1/ is better
Price
DCK is significantly cheaper at $39.99.
Speed
DCK operates at a higher speed of 11,800 RPM.
Weight
DCK is lighter at 3.5 lbs, enhancing portability.
Why DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, is better
Power
DEWALT offers up to 54% more power with FLEXVOLT batteries.
Safety Features
DEWALT includes advanced safety features like Kickback Brake.
Battery Compatibility
DEWALT is compatible with both 20V MAX and FLEXVOLT batteries.
Overall score
Specifications
| Spec | DCK 9.0 Amp Angle Grinder, 4-1/ | DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, |
|---|---|---|
| Motor Type | Brushed | Brushless |
| RPM | 11800 | 9000 |
| Safety Features | Basic Guards | Kickback Brake |
| Battery | Corded | Cordless |
| Included Accessories | 6 Pieces | None |
Dimension comparison
Overview of the DCK 9.0 Amp Angle Grinder
The DCK 9.0 Amp Angle Grinder is priced at $39.99, making it an attractive option for those seeking a budget-friendly tool. It features a 9.0 Amp motor that delivers an impressive 11,800 RPM, suitable for various tasks like cutting, grinding, and polishing. This angle grinder is designed with user comfort in mind, weighing only 3.5 lbs and equipped with a slim design that allows for extended use without excessive fatigue. The inclusion of two adjustable safety guards enhances safety during operation, making it ideal for both amateur and professional users.
Overview of the DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder
The DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder has a higher price point at $144.50 but comes with advanced features that justify its cost. This model boasts a powerful brushless motor that delivers up to 1,550 max watts and operates at a maximum speed of 9,000 RPM. The grinder is equipped with features such as Kickback Brake and E-CLUTCH, enhancing safety and performance during use. Additionally, it is compatible with both 20V MAX and FLEXVOLT batteries, providing versatility and convenience for users with existing DEWALT tools.
Performance Comparison
In terms of performance, the DCK angle grinder operates at a higher speed of 11,800 RPM compared to DEWALT's 9,000 RPM. This makes the DCK grinder potentially more effective for certain high-speed tasks. However, the DEWALT grinder offers up to 54% more power when paired with FLEXVOLT batteries, which can significantly enhance its performance for demanding applications. Both grinders are designed for heavy-duty use, but the DCK model is better suited for consistent high-speed operations, whereas the DEWALT model excels in versatility and power with its battery compatibility.
Safety Features
Safety is paramount when using power tools, and both grinders come equipped with notable safety features. The DCK angle grinder includes two different types of adjustable safety guards to protect users from flying debris, enhancing safety during cutting and grinding tasks. Conversely, the DEWALT grinder offers advanced safety mechanisms like the Kickback Brake and E-CLUTCH, which engage to prevent accidents during unexpected stalls or bind-ups. While both tools prioritize user safety, the DEWALT model provides additional electronic safety features aimed at minimizing the risk of injury.
Design and Ergonomics
The DCK 9.0 Amp Angle Grinder is designed with user comfort in mind, weighing only 3.5 lbs and featuring a compact, ergonomic design that reduces user fatigue during extended use. Its slim profile allows for easy handling, making it a good choice for those who need to maneuver in tight spaces. The DEWALT grinder, while slightly heavier due to its robust build, also incorporates a paddle switch for ease of use. Both tools are designed to be user-friendly, but the DCK model may be more appealing for users prioritizing portability and ease of handling.
Accessories and Usability
The DCK angle grinder comes with a comprehensive set of accessories, including two adjustable wheel guards, grinding wheels, cutting wheels, flap wheels, and an auxiliary handle, which adds value to the purchase at $39.99. This variety makes it a versatile tool for different projects right out of the box. In contrast, the DEWALT model is sold as a tool only, meaning users must purchase batteries and chargers separately, potentially increasing its overall cost. The inclusion of the Tool Connect Chip feature in the DEWALT grinder could appeal to users looking for advanced asset management capabilities on the job site.
Price and Value
When considering price, the DCK 9.0 Amp Angle Grinder is about 73% cheaper than the DEWALT FLEXVOLT ADVANTAGE model, with a price difference of $104.51. For users on a budget or those who require a grinder for occasional use, the DCK model offers excellent value without compromising essential features. On the other hand, the DEWALT grinder may be worth the investment for professionals who need high performance and versatility, especially when utilizing FLEXVOLT batteries.
Which should you buy?
Ultimately, the choice between the DCK 9.0 Amp Angle Grinder and the DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder depends on your specific needs and budget. If you are looking for a cost-effective option that excels in speed and usability, the DCK grinder is a great selection. However, if you require advanced safety features and the versatility of battery compatibility for professional applications, the DEWALT grinder is the superior choice despite its higher price. Each tool has its strengths, catering to different types of users.

