These bits GRIP and rips wood, these initial threads pull the drill bit into the wood very quickly, after that the blade takes a run bites which open the opening rupture of the hole is extremely uncomfortable and difficult to manage. Ruined a wood project by grabbing and tearing when trying to drill a hole with them. I built a bluebird house and used a 1 1/4 drill bit for the entry hole, ruined the panel and had to go back to my old hole saw.
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