With threaded holes in order to balance with supplied balancing screws
• Coolant thru the spindle capability 
• Pre-Balanced up to 25,000 rpm
• For maximum gripping power with exceptional concentricity. 
• Concentricity of ≤.0001” with tool shrunk in holder. 
• Tool is gripped 360° along the entire length of bore resulting in an evenly distributed clamping force. 
• Back up screws are available on request

For dimensional drawings of this product: Click Here