Maximum 0.0002 TIR or better. 360 degree tool grip along the entire length of bore resulting in an evenly distributed clamping force and superior concentricity. Ideal for end milling, drilling and other critical rotary tool applications. No need wrenches, Collets, set screws and other accessories.The item "3/8-4 projection Shrink Fit CAT40 end mill holder Germany KELCH G2.5/25000RPM" is in sale since Wednesday, March 14, 2018. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Workholding & Toolholding\Toolholding\Adapters & Holders\Rotary Tool Adapters & Holders". The seller is "niuniucme" and is located in Madison Heights, Michigan. This item can be shipped worldwide.