Ryobi · Updated July 2026
Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only): price & specs
Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only). Every price and spec below is linked to its source and dated — no guesses.
Source: ryobitools.com verified ✓ corroborated verify in ledger
The Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) is listed at $49.97 on ryobitools.com as of 2026-07-25, the cheapest angle grinders (median $144); other retailers may be lower. It earns a Silver Deskmark — 64/100 pay-blind standing, #6 of 17 in class.
Verified Jul 25, 2026 · figures linked to their source in the table below
Price history
$49.97Is the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) a good buy?
At $50, the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) is the cheapest of the 18 angle grinders we track, where the median is $149. On the spec sheet, its disc size of 4.5 in is the lowest of the 18, its max of 6500 rpm is the lowest of the 18, and its weight of 4.8 lb is above the median of the 17.
Specifications
| Price (US) | $49.97 — current on record (was $59) |
|---|---|
| Brand | Ryobi |
| Released | — |
| Disc size (in) | 4.5 in |
| Power source | cordless |
| Amps or voltage | 18 V |
| Max (rpm) | 6500 |
| Brushless | No |
| Switch type | trigger |
| No volt release | — |
| Weight (lb) | 4.8 |
Source: ryobitools.com (verified 2026-06-20) · corroborated by amazon.com. 4.5 in disc, 18V, 6,500 RPM, 4.8 lbs confirmed across Ryobi page and Amazon. Switch corrected paddle->trigger: documented as an underside trigger switch with top lock-off (Vehicle Service Pros / retailer specs), not a paddle. Brushed motor (brushless false). Listed discontinued on Ryobi.com.
Is the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) worth it vs cheaper angle grinders?
Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) against its closest cheaper and pricier angle grinders on the specs that matter — every value sourced. See all 18 ranked
| Product | Price | Disc size (in) | Power source | Amps or voltage | Max (rpm) | Brushless |
|---|---|---|---|---|---|---|
| Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) this | $49.97 | 4.5 in | cordless | 18 V | 6500 | No |
| Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder | $74 | 4.5 in | corded | 6.2 A | 10000 | No |
Frequently asked questions
How much does the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) cost?
The Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) has a US price of $49.97, as of 2026-07-25.
How does the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) compare on price?
At $50, the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) is the cheapest of the 18 angle grinders we track, where the median is $149.
Has the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only)'s price dropped?
Yes — since 2026-06-27 the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) has fallen 15.3%, from $59 to $49.97.
What is the lowest price the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) has been?
The lowest we have recorded for the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) is $49.97 on 2026-07-25 — which is its current price.
Is now a good time to buy the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only)?
At $49.97, the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) is at the lowest price we have recorded since 2026-06-27.
What are the Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only)'s key specs?
Ryobi P421 18V ONE+ 4-1/2 in. Cordless Angle Grinder (Tool Only) (Ryobi): disc size in 4.5 in, power source cordless, amps or voltage 18 V, max rpm 6500, brushless No. Full sourced spec sheet verified 2026-06-20.
Price of record: $49.97 at ryobitools.com, 2026-07-25. Other retailers may be lower — check the current price:
Check current price at amazon.com As an Amazon Associate we earn from qualifying purchases.Similar angle grinders
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Compare with
Head-to-head
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Step up
- Metabo HPT G12SR4 4-1/2 in. 6.2 A Slide Switch Corded Angle Grinder $74
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- Milwaukee 6130-33 7.0 A 4-1/2 in. Small Angle Grinder $89.99
- Bosch GWS18V-45 18V 4-1/2 in. Cordless Angle Grinder (Bare Tool) $95.06
- Bosch 1375A 4-1/2 in. 6 A Corded Angle Grinder $98
- Ridgid R86040B 18V X4 4-1/2 in. Cordless Angle Grinder (Tool Only) $99