They are perfect and did their job for me. I needed a 3 1/2" diameter cup holder in an ashtray/cup holder do what I do. I used a template of the correct diameter size to make them into pieces. I've included a video clip and photos showing how well they do their job. I used to try to make a coaster using 1 inch Forstner bits but they left marks that I didn't like at all. These bits took care of the problem. Oh I used these bits on a walnut and they acted like champs. Cut it like Buta! I've used 3 of these and they all worked great. I hope they hold up. Very happy with them.
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