3/16" x 3" long Groo-V Tip Granite, Marble and Porcelain Multi-Purpose Drill Bit - Pack of 25 Designed for Drilling Marble, Granite, Porcelain Tile, Hard Metal, Plastic, Wood, Masonry Point Diameter: 3/16 in (5 mm) Shank Diameter: 3/16 in (5 mm) Overall Length: 3 in (76.2 mm) Drilling Depth: 1-7/8 in (47.62 mm)