Sandvik Coromant 8107459 Hydraulic Tool Holders & Chucks; Shank Type: Modular Connection ; Connection Size: HSK63A ; Taper Size: HSK63A ; Nose Diameter (Decimal Inch - 4 Decimals): 0.7874 ; Nose Diameter (Mm) ( - 2 Decimals): 20.00 ; Projection (mm):