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Meguiar's
Meguiar's MT300 Professional DA Polisher
$286.99
Released 2014
Best Car Polishers · head-to-head
Meguiar's MT300 Professional DA Polisher vs Adam's Swirl Killer 15mm LT Polisher
A sourced, side-by-side comparison. Adam's Swirl Killer 15mm LT Polisher is cheaper at $249.99. Every spec and price links to its source.
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Adam's Polishes
Adam's Swirl Killer 15mm LT Polisher
$249.99Cheaper
Which is better: the Meguiar's MT300 Professional DA Polisher or Adam's Swirl Killer 15mm LT Polisher?
The Meguiar's MT300 Professional DA Polisher wins 1 of the 1 specs we compare head to head; the other wins 0. The Adam's Swirl Killer 15mm LT Polisher is the cheaper at $249.99. Get the Meguiar's MT300 Professional DA Polisher for the stronger spec sheet, the Adam's Swirl Killer 15mm LT Polisher to spend less.
See Meguiar's MT300 Professional DA Polisher on Amazon See Adam's Swirl Killer 15mm LT Polisher on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Meguiar's MT300 Professional DA Polisher | Adam's Swirl Killer 15mm LT Polisher |
|---|---|---|
| US price | $286.99 | $249.99 |
| Brand | Meguiar's | Adam's Polishes |
| Released | 2014 | — |
| Orbit throw (mm) | 8 | 15 |
| Motor power | 4.5 A | — |
| Speed range opm | 3,000-7,500 | up to 5,000 (mfr.-stated ceiling; full range not published) |
| Backing plate size (in) | 3 in / 5 in / 6 in | 5 in |
| Variable speed | Yes | Yes |
| Action type | gear-driven dual-action (forced rotation, Digital Torque Management) | free-spin dual-action (random orbital) |
| Cord length (ft) | — | 25 |
| Weight (lb) | 5.4 | 5.75 |
Sources — Meguiar's MT300 Professional DA Polisher: meguiars.com (verified 2026-08-01). Adam's Swirl Killer 15mm LT Polisher: 44tools.com (verified 2026-08-01).
What's the difference between the Meguiar's MT300 Professional DA Polisher and Adam's Swirl Killer 15mm LT Polisher?
Where the two actually differ on the specs we track (5 of 8). Matching specs are omitted.
- Orbit throw (mm): Meguiar's MT300 Professional DA Polisher 8 vs Adam's Swirl Killer 15mm LT Polisher 15
- Speed range opm: Meguiar's MT300 Professional DA Polisher 3,000-7,500 vs Adam's Swirl Killer 15mm LT Polisher up to 5,000 (mfr.-stated ceiling; full range not published)
- Backing plate size (in): Meguiar's MT300 Professional DA Polisher 3 in / 5 in / 6 in vs Adam's Swirl Killer 15mm LT Polisher 5 in
- Action type: Meguiar's MT300 Professional DA Polisher gear-driven dual-action (forced rotation, Digital Torque Management) vs Adam's Swirl Killer 15mm LT Polisher free-spin dual-action (random orbital)
- Weight (lb): Meguiar's MT300 Professional DA Polisher 5.4 vs Adam's Swirl Killer 15mm LT Polisher 5.75