Tongue and Groove Joinery

When joining two boards together lengthwise, the tongue and groove joint is much stronger than a butt glue joint. Tongue and groove joints can be created on matching boards using matching router bits, or on a table saw. In this woodworking article, learn how to use your table saw to make perfectly matching tongue and groove joinery.

Source: http://woodworking.about.com/od/joinery/ss/TongueAndGroove.htm

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