Lenox Tools 10507830 38mm Diamond Grit Hole Saw Brazed diamond edge for more holes in tile and stone - Robust design for greater durability in tough applications - Cuts holes in less time than carbide grit or carbide tipped hole saws - Round holes make removing plugs faster and easier. Diamond Edge for longer life and speed Fast and Easy Cutting Easy Plug Removal Provides More Holes in Less Time Ideal for Cement board, Abrasives, tile and Stone Brazed diamond edge for more holes in the hardest ceramic and stone materials Robust design for greater durability in tough applications Round holes make removing plugs faster and easier Fits Arbor 2L, 3L, 6L Comes With Pilot Drill and Hex Key.