DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, vs SHALL 4-1/
Updated July 2026 — DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, wins on power and safety, SHALL 4-1/ wins on value and weight.
The DEWALT FLEXVOLT ADVANTAGE is a superior tool for heavy-duty tasks, while the SHALL grinder is a budget-friendly option for lighter use.
Why DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, is better
Power
DEWALT delivers up to 54% more power with FLEXVOLT batteries.
Safety Features
DEWALT includes advanced safety mechanisms like Kickback Brake.
Brand Reputation
DEWALT is known for durability and professional-grade performance.
Why SHALL 4-1/ is better
Price
SHALL is significantly cheaper at $29.99.
Weight
SHALL is lightweight at 3.7 pounds for easier handling.
Accessories
SHALL includes multiple accessories for immediate use.
Overall score
Specifications
| Spec | DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, | SHALL 4-1/ |
|---|---|---|
| Max Watts | 1550 | 500 |
| RPM | 9000 | 11000 |
| Battery Type | FLEXVOLT | None |
| Motor Type | Brushless | Brushed |
| Included Accessories | Tool Only | Complete Kit |
Dimension comparison
Overview of DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder
The DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder is a high-performance tool designed for those seeking power and advanced features. Priced at $144.50, it is significantly more expensive than the SHALL angle grinder, which retails for just $29.99. The DEWALT model boasts a brushless motor that delivers up to 1,550 max watts out and can reach speeds of up to 9,000 rpm. This angle grinder is particularly powerful when paired with FLEXVOLT batteries, offering up to 54% more power than standard 20V batteries.
Overview of SHALL 4-1/2 Inch Angle Grinder
The SHALL 4-1/2 Inch Angle Grinder is an entry-level tool priced at $29.99, making it an attractive option for budget-conscious consumers. It features a 4 Amp motor with a maximum power output of 500 W, enabling a no-load speed of 11,000 RPM. This means that while it may not match the overall power of the DEWALT grinder, it provides decent cutting and grinding capabilities for light to moderate tasks. Its lightweight design at just 3.7 pounds enhances user comfort, making it suitable for extended use.
Power and Performance Comparison
In terms of power and performance, the DEWALT FLEXVOLT ADVANTAGE outshines the SHALL grinder. The DEWALT model can deliver up to 54% more power when used with compatible FLEXVOLT batteries, making it ideal for demanding tasks. On the other hand, the SHALL grinder's 4 Amp motor provides a maximum of 500 W, which is sufficient for basic cutting and grinding but may struggle with tougher materials. The DEWALT’s max speed of 9,000 rpm is lower than SHALL’s 11,000 rpm; however, the overall performance advantage lies with DEWALT due to its robust motor and advanced technology.
Safety Features
Safety is a crucial aspect of any power tool, and the DEWALT FLEXVOLT ADVANTAGE comes equipped with several advanced safety features. The Kickback Brake engages with maximum force to stop the wheel quickly during a bind-up, while the E-CLUTCH system shuts down the motor within a tenth of a second when a pinch or stall is detected. In contrast, the SHALL grinder includes two wheel guards for user protection and a slide switch with a lock-off/on feature for easier operation. However, it lacks the advanced safety mechanisms of the DEWALT model, which may be a concern for users who prioritize safety.
Design and Ergonomics
The design and ergonomics of both grinders cater to user comfort but in different ways. The DEWALT FLEXVOLT ADVANTAGE is designed for heavy-duty applications, whereas the SHALL grinder emphasizes lightweight and compactness, weighing just 3.7 pounds. The SHALL grinder also features an ergonomic 2-position side handle made of non-slip rubber, enhancing control during use. While DEWALT does not specify its weight, it is generally seen as a more substantial tool designed for rigorous tasks. Users looking for prolonged comfort may find the SHALL grinder to be more suitable for light to moderate applications.
Accessories Included
When it comes to accessories, the SHALL grinder offers a comprehensive package, including two wheel guards, three cutting discs, three grinding wheels, a wrench, and extra carbon brushes for extended motor life. This makes it a great choice for those who want a complete kit for immediate use. On the other hand, the DEWALT FLEXVOLT ADVANTAGE is sold as a tool only, meaning that users will need to purchase batteries and chargers separately. This could add to the overall cost, especially for those who do not already own DEWALT batteries.
Brand Reputation and Sales Rank
DEWALT has established itself as a trusted brand in the power tools market, often associated with durability and professional-grade performance. The DEWALT FLEXVOLT ADVANTAGE ranks 14,755 in sales, indicating a solid position among similar products. In comparison, the SHALL grinder has a sales rank of 21,110, suggesting it is less popular among consumers. This difference in sales rank can reflect user confidence in the brands and their respective product offerings.
Which should you buy?
Choosing between the DEWALT FLEXVOLT ADVANTAGE and the SHALL 4-1/2 Inch Angle Grinder ultimately depends on your needs and budget. If you require a powerful, durable tool for heavy-duty tasks and safety features are a priority, the DEWALT model is worth the investment at $144.50. However, if you are looking for an economical option for light to moderate use, the SHALL grinder offers a compelling package for just $29.99. Both tools have their merits, but the DEWALT FLEXVOLT ADVANTAGE clearly stands out for professional applications and advanced safety features.

