Both the collet and the nut are processed with a built-in body clamping milling cutter, which doubles the efficiency and effectively solves the problem of machine tool travel. Dynamic balancing design / high precision. Dynamic balance: G2.5 30000rpm. Stable at high speed machining. The nut of SK40 knife handle A is different from that of B, and purchasing B SK40 knife handle will give you a special wrench as a gift. The 7:24 taper accuracy of the tool holder is less than or equal to AT3, and some standard dimensions are completed in the last inspection of the standard gauge made in Germany. The inner cone is detected by a standard pneumatic measuring instrument, and the contact area ratio of the large end is above 90%. Tool holder is suitable for medium-speed precision machining. Dynamic balance: G2.5 20000rpm. The clamping range of ER25 is 2-16mm. The clamping range of ER32 is 3-20mm. The special built-in nut design reduces and reduces the resistance and vibration generated during cutting, and improves the processing quality and stability. 1Pcs x Built-in tool holder. There may be some delays due to flight, holiday, weather, local post, local natural disaster impact. It must also be in the original packaging.