Milling Chuck, Taper Size HSK100A, Hole Dia. 1-1/4 in, Nose Dia. 2.6700 in, Collet Series KM1.1/4, Projection 115.00mm, Coolant Fed Coolant Through, Bore Depth 2.5300 in to 3.2680 in, Clamping Range 3/16 in to 1-1/4 in, Features 140 Percent More Bearing Surface than Competitor Milling Chucks;For Quiet and Stable Heavy Milling;Nikken Patented Design;Nut Body Contact, Nose Clamping and Anti-Vibration Mechanism;Thick Body and Internal Slots Provide Extremely Strong Chucking Torque and Rigidity