F&D Tool Company 30539 Shell Reamer Arbors, Straight Shank, No. 12, 3 9/16" to 4" Fitting Sizes, 5" Morse Taper, 2 1/8" Shank Diameter, 16" Overall Length
These arbors are designed to fit Shell Reamers and Shell Mills having taper holes 1/8 inch per foott