Forstner Bits

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Forstener Bits are excellent at producing clean flat-bottomed holes in wood (e.g. to locate Euro Hinges on kitchen unit doors).

They take some force to push them through the timber, so are best suited to use in a Drill Press. Since they locate mainly on their rim, with only a small central point, it is possible to drill a series of overlapping holes (e.g. to clear the waste from a Housing Joint).

Their name is derived from their inventor, Benjamin Forstner, an American gunsmith who patented the design in 1874. Saw Tooth variants are now available which cut a little faster and are more suitable for drilling into end grain.