I was trying to find a good drill bit to drill holes in different types of glass I drill holes in plates to To make "flowers" for garden art. Plates (as well as saucers, bowls, vases, etc.) are purchased entirely from flea markets and thrift stores, so the composition and history of each plate is well known. Unknown. I've tried different brands of bits. Also when drilling panels underwater at low speed and using little force (as recommended) the bits wore out quickly (especially on the tip if…