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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23
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Description
18-Volt ONE+ Cordless 4-1/2 in. Angle Grinder (Tool-Only)RYOBI introduces the 18 Volt ONE+ Cordless 4 1 2 in. Angle Grinder (Tool Only). The ONE+ 4 1 2 in. Angle Grinder offers cordless convenience and the power of 6500 RPM for fast and precise work. This tool offers a host of user friendly features, such as onboard wrench storage, the comfortable GRIPZONE overmold, and a 3 position side handle to help reduce fatigue. It also has an intuitive trigger switch. Best of all, it is part of the RYOBI ONE+ System
RYOBI introduces the 18-Volt ONE+ Cordless 4-1/2 in. Angle Grinder (Tool-Only). The ONE+ 4-1/2 in. Angle Grinder offers cordless convenience and the power of 6500 RPM for fast and precise work. This tool offers a host of user-friendly features, such as onboard wrench storage, the comfortable GRIPZONE overmold, and a 3-position side handle to help reduce fatigue. It also has an intuitive trigger switch. Best of all, it is part of the RYOBI ONE+ System of over 175 Cordless Tools that all work on the same battery platform. Backed by the RYOBI 3-Year Manufacturer's Warranty, the 18-Volt ONE+ 4-1/2 in. Angle Grinder includes a side handle, a Type 27 grinding guard, a grinding wheel, a spanner wrench, and an operator's manual. Battery and charger sold separately.- California residents
- 18-Volt for high-power applications
- 6500 RPM for precision at high speeds
- 4-1/2 in. grinding wheel for added value and convenience
- Onboard spanner wrench conveniently located in the side handle for easy access
- Tool-free guard for easy guard positioning
- Compatible with all RYOBI 18-Volt ONE+ Batteries
- 3-position side handle
- GRIPZONE overmold for improved comfort with a positive grip
- Part of the RYOBI ONE+ System of over 175 Cordless Tools
- 3-year manufacturer's warranty
- Includes: (1) P421 18-Volt ONE+ 4-1/2 in. Angle Grinder, (1) side handle, (1) Type 27 grinding guard, (1) grinding wheel, (1) spanner wrench, and operator's manual
- Battery and charger sold separately
- *Stem Pack Style Battery
Features
| Item Weight | 6.18 |
| Power Tool Features | Adjustable Handle Position,Grinding Wheel Included,No Additional Features,No Tool Wheel Change,Spindle Lock |
| Arbor Size | 5/8 x 11 UNC |
| Battery Power Type | Lithium Ion |
| Batteries Included | No |
| Electronic Speed Control | Yes |
| Battery Size | Lithium Ion |
| Cordless Tool Type | Angle Grinder |
| Color Family | Green |
| Amperage (amps) | 0 |
| Condition | New |
| Product Weight (lb.) | 6.18 |
| Battery Amp Hours | 0.0 |
| Returnable | 180-Day |
| Cordless/ Corded | Cordless |
| Variable Speed | No |
| Battery/Charger | Tool Only |
| Maximum Speed (rpm) | 6500 |
| Charger Included | Charger Not Included |
| Tools Product Type | Power Tool |
| Grinder Switch Type | Trigger |
| Battery/Charger2 | Tool Only |
| Number of Batteries Included | 0 |
| Number of Batteries Included2 | 0 |
| Voltage (volts) | 18 |
| Motor Type | Brushed |
| Product Width (in.) | 5.669 |
| Product Depth (in.) | 13.701 |
| Product Height (in.) | 5.443 |
| Wheel Diameter (in.) | 4.5 in |
| Certifications and Listings | UL Listed |
| Manufacturer Warranty | 3 Year Limited Warranty |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 1
Bad fit
Style: C20 Parts * 19pcs
The dust bags do not fit properly. You can get the base to acknowledge them if you place them just right, but any little movement can move them out of place. I have to constantly reseat them because the base thinks there is no bag. The stock bags do not have this problem.
Edit: It has gotten to the point where it is constantly flipping between registering and not registering the bag. Changing to 1 star because they are unusable. If I'm not there to fix it, the task fails every time.
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Reviewed in the United States on January 29, 2026
★★★★★ 5
Great product
Style: C20 Parts * 19pcs
Fits great
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 25, 2026
★★★★★ 3
Dust bags not compatible
Style: C20 Parts * 19pcs
Dust bags do not work. Not compatible as described, everything else works
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Reviewed in the United States on March 1, 2026
★★★★★ 5
Kit de Respuestos
Style: C20 Parts * 19pcs
Excelente Kit de respuestos para para mi Robot de Limpieza, ya los instalé y súper bien , me gustaron mucho
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Reviewed in the United States on March 21, 2026
★★★★★ 2
Not compatible with eufy Omni C20.
Style: C20 Parts * 19pcs
The filters are too small. To avoid dust laden air from just going around them I put pieces of paper around the edges as spacers. But they're also shorter too. No chance of a reasonable seal.
Then the vacuum bags are the wrong size too. The robot gives me an error message saying "no vacuum bag is detected". The mop still works, but no vacuum action.
I only bought this kit because the one I was using (that works) was temporarily unavailable.
Never again.
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Reviewed in the United States on April 19, 2026