Iscar 3351728 Machine Tool Arbors & Arbor Adapters; Overall Length (Decimal Inch): 4.0900 ; Shank Diameter (Inch): 3/4 ; For Cutter Hole Diameter (Decimal Inch): 0.5910 ; Projection (Decimal Inch): 0.9840 ; For Use With: SGST Slim Slot Milling Disk C