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Decent.
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Prices may varyThis product ranks #10 of 14 in DA Polisher.Three above it ↓
Last reviewed May 28, 2026
TL;DR A 21 mm throw corded DA polisher capable of swirl removal on soft-to-medium paint, but community reviews document significant bog under load and early durability concerns. No independent US electrical safety certification found.
A corded 1,100-watt DA polisher · not rotary · with a 21 mm throw and 3,000·4,500 OPM on six speed settings. Ships with a 6" fan-cooled backing plate; accepts 5" as well. Community reviews confirm swirl removal on soft-to-medium paint. The free-orbit design stalls under pressure · a real ceiling on harder or more heavily marred paint.
Experienced detailers removing moderate swirls from soft-to-medium paint will find this workable. Beginners should skip · the 21 mm throw is aggressive and free-orbit bog under load makes technique harder to develop. Note: currently listed as an Amazon add-on item · may require a qualifying order to purchase.
No UL or ETL certification confirmed in NRTL databases as of 2026-05-28. PPE requirements come from any compound used with this tool, not the polisher itself. Corded; standard e-waste drop-off handles end of life.
No. The 21 mm throw is an aggressive correction machine; beginners are better served by a smaller-throw DA (8·15 mm) that is more forgiving on soft paint and easier to control. The G21's documented bog under load also makes technique harder to develop for new operators.
The box includes a 6-inch fanned orbital backing plate. The product listing states compatibility with 5-inch plates, but the 5-inch plate appears to be sold separately · only the 6-inch plate is listed in the box contents.
UL Product iQ and Intertek ETL databases returned no matches for Griot's Garage model 10921 (G21) as of 2026-05-28. CE marking was not confirmed from listing images or Amazon's certification section.
The G21 has a 21 mm throw vs. the G15's 15 mm throw. The larger throw makes the G21 more capable for heavier correction but also increases vibration. Owners explicitly document the G21's vibration as greater than the previous BOSS generation.
Marketing copy from Griot's Garage, via Amazon. Not editorial.
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