Sinkwork Cut Polish Granite Undermount Sink 5 Inch Convex Contour Blade Zero Tolerance Resin and Metal Filled Drum Cup Wheel 1 Piece of 2" (Metal-Filled) Zero Tolerance Drum. 1 Piece of 2" (Resin-Filled) Zero Tolerance Drum. 1 Piece of 5" Diamond Turbo Convex / Contour Blade for circle shape cutting. 1 Piece of Diamond 4.5" Turbo Row Grinding Cup Wheel for concrete stone. The drum and cup wheel are with 5/8"-11 Thread arbor.