OR
Orbital Fasteners
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Very Impressed
Having been in the industry as a professional for 10 years, I now live in France, I purchased this drill bit to drill a 152 diameter 300 thick on a Weka for a pellet burner through stone and slate. Super impressed, didn't over heat, all segments in tact and was easy drilling on a hand held. Been out of the game for a while but this are some of the best bits I have seen for dry drilling.