\"12000 Series\" cutter kits are conveniently packaged with the most popular diameters in protective cases for easy transporting and safe storage. Choose from fractional or metric diameters, in 1 in or 2 in depth of cut. Each kit includes hex wrenches and 2 pilots. Hougen® Rotabroach® Annular Cutter Kit, Series: 12000, 1 in Cutting Depth, 9/16 in Minimum Cutter Diameter, 1-1/16 in Maximum Cutter Diameter, 9 Piece, 3/4 in Dia Shank, M2 HSS