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Drilling in melamine, plastic laminate, particleboard, or other abrasive materials dulls a steel countersink very quickly. So why not make it out of carbide? Thankfully, Amana did just that—they [...]

If you have an adjustable countersink bit (like the ones from Insty-Bit), you can loosen the set screw and pull the collar off, then flip it around so the flat side is facing the work. Tighten it [...]