PTC3 Diamond Mini Hole Cutters (Tile Drills) cut 5x longer and up to 2x faster than similar diamond tile drills on the market. Superior vacuum brazed diamond tip cuts through tougher materials and lasts longer for increased productivity. Slug removal slot allows for faster drilling and easy clean up. 3 Flatted shank makes tool ideal for use in cordless or corded power tools with 1/2" drill chuck. Perfect for use drilling tough materials/tiles used in high traffic areas such as airports, schools, restaurants, malls, etc.