It turns out that a hot solution of alum (ammonium aluminum sulfate), which is available in the spice rack of your local supermarket, will dissolve the steel ... for larger drill bits, but the ...

Drill bits have a tendency to wander when you first start drilling ... clean hole in a steel junction box, electrical service ...

These are robust steel drill bits, good for drilling into ... These include titanium and even crushed diamond. For drilling into metals such as stainless steel, your best bet is a HSS twist ...

So it’s always a joy to pick up a new trick, especially one as simple as putting a hardened edge on mild steel using a drill bit as a filler rod. This tip comes to us by way of [Jody], aka ...