WEN AA6158 5-Inch
The cheapest way into a 15 mm long-throw polisher, for a first-time owner polishing one or two cars a year.
Amazon $89.98$89.98
The WEN AA6158 5-Inch is the better dual action car polisher overall, rated 3.7 to 3.0. The WEN AA6158 5-Inch leads on value and warranty. The FLEX FC3321 Brushless wins on features. The WEN AA6158 5-Inch costs $409.02 less ($89.98 vs $499).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
FLEX FC3321 Brushless
A light, brushless 15 mm polisher for professionals who want the newest motor tech and can live with a one-year warranty.
Amazon $499$499
Which should you buy?
- Choose the WEN AA6158 5-Inch for value ($89.98 vs $499) and warranty (2-year warranty vs 1-year warranty).
- Choose the FLEX FC3321 Brushless for features (constant-speed electronics, brushless motor vs lock-on trigger).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every corded long-throw dual action car polisher; a clear win is highlighted. How we rank explains each one.
| Factor weight | WEN AA6158 5-Inch | FLEX FC3321 Brushless |
|---|---|---|
| Overall rating | 3.7/5 | 3.0/5 |
| Correction 30% | 62 15 mm orbit | 62 15 mm orbit |
| Value 25% | 100 $89.98 | 10 $499 |
| Warranty 15% | 25 2-year warranty | 0 1-year warranty |
| Power 10% | 80 8 A, about 960 W at 120 V | 100 1,200 W |
| Weight 10% | 50 weight not published (neutral score used) | 75 5 lb |
| Features 10% | 15 lock-on trigger | 50 constant-speed electronics, brushless motor |
Specifications
| WEN AA6158 5-Inch | FLEX FC3321 Brushless | |
|---|---|---|
| Polishing | ||
| Orbit diameter | 15 mm | 15 mm |
| Speed range | 2,000-5,200 OPM | 2,700-8,700 OPM |
| Backing plate | 5 in | 6 in |
| Forced rotation | No | No |
| Power | ||
| Power source | Corded | Corded |
| Motor rating | 8 A | 1,200 W |
| Cord | 16 ft | 19.7 ft |
| Brushless motor | Not listed | Yes |
| Controls | ||
| Constant-speed electronics | Not listed | Yes |
| Soft start | Not listed | Not listed |
| Lock-on trigger | Yes | Not listed |
| Build | ||
| Weight | - | 5 lb |
| Pads or polish included | Yes | No |
| Warranty | 2 years | 1 year |