[mhonard]

It seems the header support beams in the lanai of newer concrete homes is concrete surrounded by some sort of mesh metal. I've had terrible success drilling through the mesh metal. Once I break through the metal the concrete is no problem. I've been given all kinds of advice ranging from hammer drilling, going fast, going really slow and of course all the different metal choices (cobalt, titanium etc). I'm sure somebody who does this for a living doesn't use 6 bits to get through this mesh. Can anybody give any solid advice? Need a 1/4' hole.