High hardenability :Supports high hardenability, chuck holder is with high strength and toughness under the of hardenability, especially with high toughness of low temperature impact source. Good workability :With good workability, special processing deformation is small, and fatigue resistance is quite good. Heavy-duty thick neck design :Heavy-duty thick neck design guarantees more powerful, accurate, stable and shock-proof cutting performance. quality control standards :Built to quality control standards, tool holder's design is improved for more durability. Widely used :Applicated for machining center, lathe tool holder is easy to use in the practical life, which makes itself great popularity. Color: silver Material: high carbon steel Package Contents: 1 x CNC knife handle 1 x ER20-A accessory Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.