Pragmatic and convenient tool system can guarantee high-effect job. Features: 1) Milling chuck for excellent in the concentricity2) Heavy duty cutting power from perfect ace contact construction3) Inside spiral groove and slit groove prevent tool slip and increase powerful clamping force4) The thickest body improves the side stiffness in great deal5) Preventing relaxation of nut at high speed and over-tight by inserting dust seal and O-ring6) Preventing crack by heat-treatment7) High accuracy (inner diameter accuracy of clamp body is less than 0.005mm)8) Spring collet assures accuracy and durability for long time usage by improvement of hardness and elasticity

Milling Chuck