The sizes NO.4, 5, 6, 8, 10, 12 and 1/4", 5/16", 3/8", 7/16", 1/2" and all BA types come with 1" OD split screw adjustable die button.
The sizes 9/16" , 5/8" and 3/4" come with 1 1/2" (38mm) OD split screw adjustable die button.
The sizes 7/8", 1" come with 2" OD split screw adjustable die button.