Topic: Calculating a Countersink
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How to Calculate a Countersink
Countersinks involve drilling two holes for a screw, one for the shank and one for the head. Countersinks are useful for making screws flush with the surface or deeper so you can hide them with a wood plug. The heads of wood screws are tape... Read More »
Source: http://www.ehow.com/how_7662610_calculate-countersink.html
