HAIMER 40.8H10.3/4Z Hydraulic Tool Holders & Chucks; Shank Type: Straight-Cylindrical ; Taper Size: CAT40 ; Hole Diameter (Inch): 3/4 ; Shank Diameter (Inch): 3/4 ; Nose Diameter (Decimal Inch - 4 Decimals): 1.6500 ; Clamping Depth (Decimal Inch): 2.