Does anyone know if it is possible to re-grind Colt pen drills accurately in the workshop without any specialist tool grinders.
I find these drills great at drilling out acrylic blanks but the one I use most is starting to loose its edge and could do with a sharpen.
I find these drills great at drilling out acrylic blanks but the one I use most is starting to loose its edge and could do with a sharpen.