# DeWalt DWE402 4-1/2 in. Small Angle Grinder vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only): specs and price compared

A sourced, side-by-side comparison of the DeWalt DWE402 4-1/2 in. Small Angle Grinder (DeWalt) and Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) (Ryobi) among angle grinders. Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) is the cheaper of the two at $49.97.

## Side by side

| Spec | DeWalt DWE402 4-1/2 in. Small Angle Grinder | Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) |
| --- | --- | --- |
| US price | $117 | $49.97 |
| Brand | DeWalt | Ryobi |
| Disc size (in) | 4.5 in | 4.5 in |
| Power source | corded | cordless |
| Amps or voltage | 11 A | 18 V |
| Max (rpm) | 11000 | 6500 |
| Brushless | No | No |
| Switch type | paddle | trigger |
| No volt release | — | — |
| Weight (lb) | 4.6 | 4.8 |

## Key differences

- Power source: DeWalt DWE402 4-1/2 in. Small Angle Grinder corded vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) cordless
- Amps or voltage: DeWalt DWE402 4-1/2 in. Small Angle Grinder 11 A vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) 18 V
- Max (rpm): DeWalt DWE402 4-1/2 in. Small Angle Grinder 11000 vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) 6500
- Switch type: DeWalt DWE402 4-1/2 in. Small Angle Grinder paddle vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) trigger
- Weight (lb): DeWalt DWE402 4-1/2 in. Small Angle Grinder 4.6 vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) 4.8

## Sources

- DeWalt DWE402 4-1/2 in. Small Angle Grinder: https://www.dewalt.com/product/dwe402/4-12-115mm-small-angle-grinder (dewalt.com, verified 2026-06-20)
- Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only): https://www.ryobitools.com/products/33287139576 (ryobitools.com, verified 2026-06-20)

Canonical: https://frontdeskreview.com/gear/angle-grinders/dewalt-dwe402-vs-ryobi-p421/
Cite: Per The Front Desk Review, DeWalt DWE402 4-1/2 in. Small Angle Grinder ($117) vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) ($49.97) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/angle-grinders/dewalt-dwe402-vs-ryobi-p421/
License: CC BY 4.0.