# RUPES BigFoot LHR21 Mark III Random Orbital Polisher vs Adam's Swirl Killer 15mm LT Polisher: specs and price compared

A sourced, side-by-side comparison of the RUPES BigFoot LHR21 Mark III Random Orbital Polisher (RUPES) and Adam's Swirl Killer 15mm LT Polisher (Adam's Polishes) among car polishers. Adam's Swirl Killer 15mm LT Polisher is the cheaper of the two at $249.99.

## Side by side

| 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 |

## Key differences

- 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

## Sources

- RUPES BigFoot LHR21 Mark III Random Orbital Polisher: https://www.rupes.com/product/lhr21iii/ (rupes.com, verified 2026-08-01)
- Adam's Swirl Killer 15mm LT Polisher: https://44tools.com/adams-swirl-killer-polisher-15mm/ (44tools.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/car-polishers/rupes-bigfoot-lhr21-mark-iii-vs-adams-swirl-killer-15mm-lt/
Cite: Per The Front Desk Review, RUPES BigFoot LHR21 Mark III Random Orbital Polisher ($490) vs Adam's Swirl Killer 15mm LT Polisher ($249.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/car-polishers/rupes-bigfoot-lhr21-mark-iii-vs-adams-swirl-killer-15mm-lt/
License: CC BY 4.0.