AHK (BT-BT Type) Concentricity：0.002 mm Material：FCD60~FCD65 R.P. Read more Angle Adjustable Collet Chuck Tool Holder (External Coolant) Gear Ratio : 1:1 R.P.M. : Max. 4,000 RPM Read more Angle Adjustable Collet Chuck Tool Holder (External Coolant) Read more