Features 1、Supports high hardenability, chuck holder is with high strength and toughness under the guarantee of hardenability, especially with high toughness of low temperature impact source. 2、With good workability, special processing deformation is small, and fatigue resistance is quite good. 3、Heavy-duty thick neck design guarantees more powerful, accurate, stable and shock-proof cutting performance. 4、Built to strict quality control standards, tool holder's design is improved for more durability. 5、Applicated for machining center, lathe tool holder is easy to use in the practical life, which makes itself getting great popularity. Specification Item Type: Tool holder Material: 20CrMnTi Scope of Application: Machining center Specifications: CAT40-ER40 Accuracy: 0.005mm Speed: 8000r / min Tool Holder Length: Approx. 80mm / 3.1in(the nut can not be screwed to the end after the chuck is installed, the length of the tool holder is 80mm) Package List 1 x Tool Holder