HSK end mill holder

Main features：

1.The material: Allyed case hardened steel, black-finished and precisely grinded

2.Taper tolerance: AT3 Standard

3.Hardness: 50-55HRC

4.Run out: 0.005mm

5.Coolant: AD, ADB, B type

6.Surface: blacken, sand blasting, plating

7.Dynamic balancing : G2.5/25000rpm