Series 20, Construction 12" Combination Pack, Includes Model #DW3128 & DW3123, Tougher Tungsten Carbide Stays Sharper Longer, Thin Kerf For Smoother Cuts, Computer Balanced Plate Reduces Vibration For Improved Accuracy & Better Finish, Ideal For All Cutting Applications In Softwood, Hardwood, Chip Board Or Plywood Using A Table Saw Or Miter Saw, Professional Quality Thin Kerf Carbide Saw Blades Produce A Smooth Finish With Minimal Material Waste.