Neiko 5-Piece 3/4 to 1-5/8-Inch diamond dust hole saw set. 1/4-Inch shank size, saw sizes: 3/4, 1, 1-3/16, 1-3/8 and 1-5/8-Inch. Heavy duty hole saws plated with nickel with diamond coating gives superior performance on ceramic tile and similar material. Excellent Results in Glass, Marble, Slate, and Tile.