Counter-sinking seems to be all the rage, but where’s the love for counter-bores? You can find no end to counter-sinking bits sold online, yet for some reason the options for counter-bores is severely limited.
A counter-sink is a conical hole that lets a tapered screw head sink below the surface so it’s flush with the surface or slightly recessed. A counter-bore is a cylindrical hole with a flat bottom. It also allows the head of a bolt or screw to be flush with the surface or recessed.
Continue reading »