Sandvik Coromant 8107481 Hydraulic Tool Holders & Chucks; Shank Type: Modular Connection; Connection Size: HSK100; Taper Size: HSK100A; Chuck Hole Diameter: 3.93701 in; 100 mm; Nose Diameter (Decimal Inch - 4 Decimals): 1.2598; Nose Diameter (Mm) ( -