We compared five real 4-1/2 to 5-inch cordless angle grinders on disc speed, switch type, kickback brake and restart-protection safety features, and bare-tool vs. kit pricing.
If you only buy one, the DeWalt DCG413B is the safest all-around pick: it pairs a genuine kickback brake and no-volt restart protection with a paddle switch and DeWalt's very large 20V MAX battery ecosystem, and it's a stable, current listing on Amazon. The Makita XAG04Z and Metabo WPB 18 LT BL are just as serious on safety (Active Feedback-sensing Technology and an S-automatic slip clutch, respectively) and are worth it if you're already on those battery platforms. The Bosch GWS18V-10N is a strong choice too, but double-check the exact suffix before buying, since Bosch sells a nearly identical paddle-switch sibling (GWS18V-10PN) under a different SKU. The SKIL AG2907-00 is the budget/no-lock-in option, but it is honestly the weakest here on documented safety electronics, it has soft-start and overload protection, not a stated kickback brake.
DeWalt
Why we like it
Makita
Why we like it
Bosch
Why we like it
Metabo
Why we like it
SKIL
Why we like it| Product | Rank | Brand | Best For | Score |
|---|---|---|---|---|
| DEWALT 20V MAX* Angle Grinder Tool Cordle... | #1 | DeWalt | Best Overall Safety Package | 9.8 |
| Makita XAG04Z 18V LXT Lithium-Ion Brushle... | #2 | Makita | Best for Dual-Size Disc Flexibility | 9.6 |
| Bosch GWS18V-10N 18V Brushless 4-1/2 – ... | #3 | Bosch | Best for Bosch CORE18V / AMPShare Owners | 9.4 |
| Metabo 18V Cordless 4-1/2-Inch / 5-Inch A... | #4 | Metabo | Best Mechanical + Electronic Kickback Protection | 9.3 |
| SKIL PWR CORE 20 Brushless 20V 4-1/2-Inch... | #5 | SKIL | Budget Pick / No Amazon-Availability Issues | 9.1 |
Buyer checklist
We checked each grinder against its own manufacturer spec page (DeWalt, Makita, Bosch, Metabo) or, where the manufacturer page couldn't be reached directly, cross-referenced multiple authorized dealer listings that quote the same manufacturer part number and spec sheet. We verified every ASIN either by fetching the live Amazon listing or by confirming it against an Amazon-indexed search result showing the exact listing title. We did not perform hands-on testing; all performance and safety claims below are drawn from manufacturer documentation, not independent lab results.
No. Every manufacturer here (DeWalt, Makita, Bosch, Metabo, SKIL) ships these grinders with a wheel guard as a required safety component and documents tool-free guard adjustment, not guard removal, as the intended feature. Removing the guard defeats the disc-burst and kickback protection the guard is designed for and is not a documented or supported use case for any of these five tools.
A kickback/electronic brake (present on the DeWalt, Makita, Bosch and Metabo units checked here) senses a sudden bind, stall, or pinch of the wheel and cuts power or engages a mechanical/electronic brake to stop rotation quickly, which is meant to reduce the violent reactive torque called kickback. Restart protection is a separate feature that prevents the motor from firing automatically if the trigger or paddle was left in the "on" position when the battery was reinserted or power was restored, so the tool won't unexpectedly start spinning in your hand.
Yes, in real terms: a 5-inch wheel gives roughly 11% more radius and a larger usable cutting depth than a 4-1/2-inch wheel, and several grinders in this class (Makita XAG04Z, Bosch GWS18V-10N, Metabo WPB 18 LT BL) are rated to run both sizes on the same gearcase. The tradeoff is that swapping up to a 5-inch wheel is generally the top of what these small-angle-grinder gearcases and guards are rated for; going larger requires a different (larger-frame) grinder class entirely.