Features 1、Made of high-quality manganese steel, it has high hardness, high rigidity and strong clamping force, suitable for long-term use 2、Straight shank type extended shank with long shank for deep hole machining to solve the need for extended processing depth 3、It can reduce the use of extended cutters, effectively reduce processing costs and improve work efficiency 4、The outer diameter of the extension rod and other parts are precision ground, eliminating imbalance during cutting and increasing safety 5、Every detail of the product has been carefully processed to keep the stability and accuracy of the product Specification Features: Made of high-quality manganese steel, it has high hardness, high rigidity and strong clamping force, suitable for long-term use. Straight shank type extended shank with long shank for deep hole machining to solve the need for extended processing depth. It can reduce the use of extended cutters, effectively reduce processing costs and improve work efficiency. The outer diameter of the extension rod and other parts are precision ground, eliminating imbalance during cutting and increasing safety. Every detail of the product has been carefully processed to keep the stability and accuracy of the product. Specifications: Condition: 100% Brand New Material: manganese steel Standard: C3/4 ER20A-50L Clamping rod diameter: 3/4 Rod length: 50mm Clamping range: 1-13mm Package list: 1 * Milling Extension Rod Package List