RUPES
RUPES BigFoot LHR21 Mark III Random Orbital Polisher
$490
Released 2018-11
Best Car Polishers · head-to-head
RUPES BigFoot LHR21 Mark III Random Orbital 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 RUPES BigFoot LHR21 Mark III Random Orbital Polisher or Adam's Swirl Killer 15mm LT Polisher?
The Adam's Swirl Killer 15mm LT 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. The Adam's Swirl Killer 15mm LT Polisher both leads on specs and costs less — the straightforward pick.
See RUPES BigFoot LHR21 Mark III Random Orbital 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 | RUPES BigFoot LHR21 Mark III Random Orbital Polisher | Adam's Swirl Killer 15mm LT Polisher |
|---|---|---|
| US price | $490 | $249.99 |
| Brand | RUPES | Adam's Polishes |
| Released | 2018-11 | — |
| Orbit throw (mm) | 21 | 15 |
| Motor power | 500 W | — |
| Speed range opm | 3,000-4,500 | up to 5,000 (mfr.-stated ceiling; full range not published) |
| Backing plate size (in) | 6 in | 5 in |
| Variable speed | Yes | Yes |
| Action type | free-spin dual-action (random orbital, not gear-driven) | free-spin dual-action (random orbital) |
| Cord length (ft) | 30 | 25 |
| Weight (lb) | 5.95 | 5.75 |
Sources — RUPES BigFoot LHR21 Mark III Random Orbital Polisher: rupes.com (verified 2026-08-01). Adam's Swirl Killer 15mm LT Polisher: 44tools.com (verified 2026-08-01).
What's the difference between the RUPES BigFoot LHR21 Mark III Random Orbital Polisher and Adam's Swirl Killer 15mm LT Polisher?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Orbit throw (mm): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 21 vs Adam's Swirl Killer 15mm LT Polisher 15
- Speed range opm: RUPES BigFoot LHR21 Mark III Random Orbital Polisher 3,000-4,500 vs Adam's Swirl Killer 15mm LT Polisher up to 5,000 (mfr.-stated ceiling; full range not published)
- Backing plate size (in): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 6 in vs Adam's Swirl Killer 15mm LT Polisher 5 in
- Action type: RUPES BigFoot LHR21 Mark III Random Orbital Polisher free-spin dual-action (random orbital, not gear-driven) vs Adam's Swirl Killer 15mm LT Polisher free-spin dual-action (random orbital)
- Cord length (ft): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 30 vs Adam's Swirl Killer 15mm LT Polisher 25
- Weight (lb): RUPES BigFoot LHR21 Mark III Random Orbital Polisher 5.95 vs Adam's Swirl Killer 15mm LT Polisher 5.75