Is there a drill bit made of the material of grinding wheel of orbital grinder, which breaks down slowly as it drills, or maybe it can be made of like diamond -studded metal file, so that the drill grinds as it drills, instead of cutting through the metal? Thank you for your interest.
those are to shave the border hard edge areas. Need something to drill through metal or even wood, or even concrete.
There are tile drill bits that have diamond crusted ends, as well as concrete bits. What are you wanting to still through exactly