Compared across 13 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission.
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The 3670-20 is Milwaukee's cordless 6-inch angle grinder on the M18 platform, built around a brushless FUEL motor that spins at 9,000 RPM. Its headline feature is a mechanical brake that stops the wheel quickly when you release the trigger, plus a tool-free guard and a slim body for one-hand work. It runs on any M18 pack, so it suits tradespeople already invested in Milwaukee batteries who want grinder power without a cord. Against corded 6-inch grinders it gives up some sustained power, and against smaller 4.5-inch cordless models it is heavier but cuts deeper.
In stockSold by JC WellerReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Availability unknownSold by the_tool_connect_inc (99.7% positive, 1,100 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
Availability unknownSold by la_6049 (100% positive, 35 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
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Lowest price we've seen: $279.00 on Nov 9 at The Milwaukee Store. Tracked across 12 stores since Nov 9.
Owners rate it highly, praising the brake, the power and the smooth running. Most complaints center on weight and the fact that batteries are sold separately.
