Posted on April 5, 2017 by ABD Cyclone Marble Core Drill Bit Watch this drill bit punch through a marble slab in just 23 seconds! Uses the highest grade diamonds available. Designed so the core will pop-out as soon as the grinder is turned off. It works on all kinds of tile, especially porcelain. Post navigationPrevious post: Cyclone Dry Wet Core BitNext post: Polished Marble With Dynamite 5X