Artu Porcelain Tile Starter Kit, Drill Bit Size 1/4", Overall Length 4-1/8", Shank Dia 1/4", Carbide Tipped, Bright (Uncoated), PK 3

These kits each contain a drill bit for creating holes in porcelain tile with a scratch hardness of eight or less. They also come with a pilot bit for creating a starter hole prior to drilling, which helps prevent the drill bit from moving, or walking, when starting to drill. The drill bits have spiral flutes that pull dust and chips out of the hole during drilling.