Bosch HTC8PC 8-Piece Carbide Hole Saw Master Set Set contains five hole saws measuring in inches: 1, 1-1/8,1-3/8, 1-3/4 and 2-1/4 Comes with 2 pilot bits Includes one 3/8-inch mandrel Part of Bosch's extensive collection of accessories Eight piece set Set Contains: (5) hole saws: 1-inch, 1-1/8-inch,1-3/8-inch, 1-3/4-inch, 2-1/4-inch; (2) pilot bits ; (1) 3/8-inch mandrel