Lenox Tools 1211110DGDS Diamond Grit Drill Bit D/S-10DG, 5/8-Inch or 15.9mm The product is 5/8" Diamond Hole saw Easy to use The product is manufactured in China 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