Diamond Core Drill Bit by Bon Tools Save Liquid error (product-badge line 32): Computation results in '-Infinity'% $58.50 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart #87-215 Equipped with 1/4" pilot bit Use for wet or dry cutting For cutting holes in marble, granite, porcelain tile and general tile 13/8" bit diameter, 3/8" shank diameter 2" cutting depth