Features:

1) Milling chuck for excellent in the concentricity
2) Heavy duty cutting power from perfect ace contact construction
3) Inside spiral groove and slit groove prevent tool slip and increase
powerful clamping force
4) The thickest body improves the side stiffness in great deal
5) Preventing relaxation of nut at high speed and over-tight by inserting
dust seal and O-ring
6) Preventing crack by heat-treatment
7) 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