I really don't know why there weren't any comments on this topic, but they don't even cut pretty soft stone. They're great for wood if you buy them for that. You should definitely take Rock off this list!
Kutzall Original Cylinder Rotary Burr, 1β8" Shaft, Fine - Woodworking Attachment For Dremel, Foredom, DeWalt, Milwaukee. Abrasive Tungsten Carbide, 1β8" (3.1Mm) Dia. X 7β8" (22.2Mm) Length, C-18-EG
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Kutzall Original Cylinder Rotary Burr, 1β8" Shaft, Fine - Woodworking Attachment For Dremel, Foredom, DeWalt, Milwaukee. Abrasive Tungsten Carbide, 1β4" (6.3Mm) Dia. X 1β2" (12.7Mm) Length, C-14-EG
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