These are carpentry Forstner bits and can be bought from eighth of an inch up to one inch. The ones I have in the photo are quarter, three-eighth, and one-half inch. With a power drill they will cut a perfectly clean hole in seconds. A small block of wood behind while cutting will help. The holes in the plastic container in the photo are three-eighths inch and I cut that row in about one minute. I have been using Forstner bits for over 20 years and think they are the best. The one thing to remember is never use your cage bits for anything but plastic and they will stay sharp forever.

Kelly

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