DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, vs PRODIAMANT Fast Mortar Joint Cleaning –
Updated July 2026 — DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, wins on safety and power, PRODIAMANT Fast Mortar Joint Cleaning – wins on price.
The DEWALT FLEXVOLT ADVANTAGE Angle Grinder is a powerful and versatile tool, while the PRODIAMANT Fast Mortar Joint Cleaning tool is a specialized attachment for specific tasks.
Why DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, is better
Power
DEWALT grinder delivers up to 54% more power.
Safety Features
Includes advanced safety features like Kickback Brake.
Versatility
Compatible with all DEWALT 20V MAX* and FLEXVOLT batteries.
Why PRODIAMANT Fast Mortar Joint Cleaning – is better
Price
PRODIAMANT tool is significantly cheaper.
Specialization
Designed specifically for mortar joint cleaning.
Ease of Use
Effective and easy to use for its specific task.
Overall score
Specifications
| Spec | DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder, | PRODIAMANT Fast Mortar Joint Cleaning – |
|---|---|---|
| Max Watts | 1550 | N/A |
| RPM | 9000 | N/A |
| Battery Compatibility | 20V MAX* & FLEXVOLT | 5/8”-11 |
| Weight | 5.6 lbs | N/A |
| Cutting Edges | N/A | 3 Tungsten Carbide |
Dimension comparison
Overview of the DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder
The DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder is a powerful tool designed for heavy-duty tasks. Priced at $144.50, it offers features that aim to enhance user safety and efficiency, making it a solid choice for both professionals and DIY enthusiasts. Its popularity is reflected in its sales rank of 14,755, indicating a strong demand in the market.
This angle grinder boasts a brushless motor that delivers 1,550 max watts out and can reach up to 9,000 RPM. It includes advanced safety features like the Kickback Brake and E-CLUTCH system, which are designed to protect users during operation. The DEWALT grinder is part of a broader system compatible with both 20V MAX* and FLEXVOLT batteries, ensuring versatility across various DEWALT tools.
Overview of the PRODIAMANT Fast Mortar Joint Cleaning
The PRODIAMANT Fast Mortar Joint Cleaning tool is a specialized attachment for angle grinders, priced at $32.70. Designed for professional masonry work, it stands out for its efficiency in removing mortar, making it ideal for repointing jobs. Its sales rank of 57,692 suggests it serves a niche market focused on specific renovation tasks.
This tool features three tungsten carbide edges that ensure smooth and controlled cutting. It is built for full-depth cleaning with a working length of 26 mm, which removes joints without leaving residue. The PRODIAMANT cutter fits most angle grinders with a 5/8”-11 threaded shank, making it a versatile addition to any contractor’s toolkit.
Performance Comparison
In terms of performance, the DEWALT FLEXVOLT ADVANTAGE Angle Grinder clearly outshines the PRODIAMANT attachment. The DEWALT grinder is designed to deliver up to 54% more power when paired with FLEXVOLT batteries, offering significant advantages for heavy-duty tasks. Its maximum output of 1,550 watts and speed of 9,000 RPM allow it to tackle a range of materials with ease.
On the other hand, the PRODIAMANT Fast Mortar Joint Cleaning tool excels at a specific task: mortar removal. While it does not have a power rating of its own, the effectiveness of this attachment largely depends on the performance of the angle grinder it is paired with. Thus, users must consider the capabilities of their existing grinders for optimal results.
Safety Features
Safety is paramount when using power tools, and here, the DEWALT angle grinder is equipped with several advanced safety features. Its Kickback Brake engages with maximum force to stop the wheel and shut off the grinder in case of a bind-up, significantly reducing the risk of injury. Additionally, the E-CLUTCH system can shut down the motor in under a tenth of a second during a pinch or stall, enhancing user protection.
In contrast, the PRODIAMANT tool does not possess inherent safety features as it is an attachment rather than a standalone tool. The safety during use will depend on the angle grinder it is attached to, which means users must ensure that their grinder has adequate safety mechanisms in place.
Versatility and Compatibility
The DEWALT FLEXVOLT ADVANTAGE Angle Grinder is highly versatile, compatible with all DEWALT 20V MAX* and FLEXVOLT batteries. This compatibility allows users to leverage existing batteries across a range of tools, making it a cost-effective choice for those already invested in the DEWALT ecosystem. Furthermore, the angle grinder is ready for use with the Tool Connect Chip, adding a layer of asset management that is beneficial on job sites.
Meanwhile, the PRODIAMANT Fast Mortar Joint Cleaning tool is designed to fit most angle grinders with a 5/8”-11 threaded shank. While this makes it versatile in terms of compatibility, it does not offer the same breadth of functionality as a dedicated angle grinder like the DEWALT model. Users looking for an attachment must ensure their grinder is compatible, which may limit options for some.
Price Comparison
The DEWALT FLEXVOLT ADVANTAGE Angle Grinder is available for $144.50, while the PRODIAMANT Fast Mortar Joint Cleaning tool is priced at $32.70. This represents a price difference of about 340%, with the DEWALT product being significantly more expensive. However, it is essential to consider what each product offers for the price. The DEWALT grinder is a complete tool with advanced features, whereas the PRODIAMANT tool is a specialized attachment catering to a specific task.
For users who require an efficient angle grinder for various applications, the investment in the DEWALT model may be justified. However, for those focused solely on mortar joint cleaning, the PRODIAMANT tool offers a more budget-friendly option.
User Experience and Community Feedback
User feedback for the DEWALT FLEXVOLT ADVANTAGE Angle Grinder highlights its powerful performance and reliability. Many users appreciate the quick-stop capabilities and the overall durability of the tool, which stands up well to frequent use in demanding environments. The solid construction and safety features have earned it a positive reputation among professional contractors.
The PRODIAMANT Fast Mortar Joint Cleaning tool has been noted for its effectiveness in mortar removal, with users praising its efficiency and ease of use. However, as an attachment, its performance heavily relies on the angle grinder it is paired with. Overall, while it is well-received for its specific functionality, it may not appeal to users seeking a more versatile tool.
Which should you buy?
In conclusion, the choice between the DEWALT FLEXVOLT ADVANTAGE 20V MAX* Angle Grinder and the PRODIAMANT Fast Mortar Joint Cleaning tool largely depends on your specific needs. If you are looking for a powerful, versatile angle grinder with advanced safety features, the DEWALT model is the clear winner, despite its higher price. However, if your primary goal is to efficiently clean mortar joints and you already possess a compatible angle grinder, the PRODIAMANT attachment offers a cost-effective solution. Ultimately, your decision should align with the tasks you plan to undertake and the tools you already have at your disposal.

