The Dremel 4000 is far superior to the 3000 for one major reason. I take them both apart to show you why.

Tools in this video:
Dremel 4000 - https://amzn.to/3dR7V04
Dremel 3000 - https://amzn.to/37RqL3g
Foredom Flex Shaft Rotary Tool - https://amzn.to/2O8ZIJK

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