Features DURABLE MATERIAL: Use of excellent 40CrMnTi material, surface cooling process, stable working and high hardness, no deformation after long-term use. STABLE OPERATION: Bilateral card key, double-sided clamping design, not easy to turn left and right during heavy cutting, which ensures processing rigidity. FOR MILLING TOOL: The mill shaft adapter is commonly used in milling machine brackets, suitable for various situations of CNC milling processes. GOOD PERFORMANCE: The milling tool holder has high thermal resistance and oxygen resistance, as well as good integral mechanical properties. STANDARD THREAD: The cutter tool holder has standard thread 7/16-20, with high precision, easy installation and clamping and good working stability. Specification: Item Type: Milling Tool Holder Model No.: R8 FMB32 Material: 40CrMnTi Accuracy: 0.01mm Hardness: >HRC50°-55° Thread Size: 7/16-20 Package List: 1 x Milling Tool Holder Package List 1 x Milling Tool Holder