1 Inch diameter Arbor Extension for Delta and Rockwell 12/14 Inch Table Saws. Arbor Nut 902-01-201-2553 and Flange 422-06-103-5003 available separately. If you are looking for the 34-943 1 1/8 inch or the 34-948 1 1/4 inch extension call us. We can add a bushing to allow you to use the 1 inch Arbor with your larger blades.