# Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded 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 Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder (Metabo HPT) 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 | Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder | Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) |
| --- | --- | --- |
| US price | $74 | $49.97 |
| Brand | Metabo HPT | Ryobi |
| Disc size (in) | 4.5 in | 4.5 in |
| Power source | corded | cordless |
| Amps or voltage | 6.2 A | 18 V |
| Max (rpm) | 10000 | 6500 |
| Brushless | No | No |
| Switch type | slide | trigger |
| No volt release | — | — |
| Weight (lb) | 4 | 4.8 |

## Key differences

- Power source: Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder corded vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) cordless
- Amps or voltage: Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder 6.2 A vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) 18 V
- Max (rpm): Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder 10000 vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) 6500
- Switch type: Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder slide vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) trigger
- Weight (lb): Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder 4 vs Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) 4.8

## What reviewers say

**Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder** — Only one whitelisted tester (Pro Tool Reviews) covers the G12SR4, and it appears in a corded slide-switch lineup overview, not a hands-on lab test (the outlet did not test the tool). PTR frames it as the range's most budget-friendly pick at $39, bundled with five abrasives and a carrying case, and lists the manufacturer specs (980W, 10,000 RPM, 4 lbs). No outlet published tester-measured performance data. (1 sourced review.)

## Sources

- Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder: https://www.metabo-hpt.com/us/main-navigation/item/g12sr4-6-2-amp-4-1-2-angle-grinder-w-5-abrasive-wheels-Metabo-HPT (metabo-hpt.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/metabo-hpt-g12sr4-vs-ryobi-p421/
Cite: Per The Front Desk Review, Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder ($74) 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/metabo-hpt-g12sr4-vs-ryobi-p421/
License: CC BY 4.0.