1、Lengthened design is conducive to deep cavity operations, reduces the consumption of long tools, saves costs, and improves processing efficiency. 2、The design of the central through hole is conducive to water cooling and effectively suppresses vibration (the through hole does not have threads). 3、The handle is high‑accuracy grinding, the corners are smooth and no burrs, which has comfortable hand touch. 4、Advanced vacuum quenching treatment can realize carbon and oxygen co‑permeation, increase hardness and enhance lifespan. 5、Made of high quality 42CrMo, rugged, corrosion resistant and durable. Perfect for CNC machine tools, etc. 1 x Collet Chuck Holder Item Type: Collet Chuck HolderMaterial: 42CrMoModel: C32-ER32UM-100LUses: Used for CNC machine tools, etc.Accuracy: ≤ 0.08mmShank Diameter: Approx. 32mm/ 1.3inShank Length: Approx. 100mm/ 3.9inFeatures: Quenched and hardened, the outer diameter and the ER inner cone are finely ground, which eliminates the unbalanced margin, which is conducive to the stability of the cutting process; the shank body is longer, suitable for deep hole processing, reducing the selection of machining tools and reducing costs. Improve efficiency