Big Horn 18415 Table Saw Insert, Powermatic/66 Fits Powermatic #66 with 3-7/8-Inch by 14-1/2-Inch opening. Eliminate spaces between blade and saw insert where small pieces fall through and provides added support for your work. A must for working with veneers and melamine Excellent with dado blades Comes with fitting nubs, leveling screws with allen key, and rear stabilizing pin.