Features 1、For ER16A Chuck: This kit includes C20‑ER16A‑100L chuck extension rod and a wrench, suitable for ER16A chuck, which can be directly replaced with old or damaged ones. 2、Straight Shank: The extension rod is designed with a straight shank, which is easy to install and disassemble, suitable for deep hole machining, efficient and practical. 3、Manganese Steel: The extension rod is made of excellent manganese steel material with quenched finish, has high hardness, strong oxidation resistance, and long service life. 4、Standard Sizes: The chuck extension rod and wrench have standard sizes to ensure stable clamping and accurate adjustment, effectively reducing operational errors. 5、CNC Lathe Parts: This straight shank extension rod and wrench kit is mainly used for CNC lathes, and suitable for various milling projects, with strong practicality. Specification Item Type: Chuck Extension Rod Model: C20-ER16A-100L, ER16A Material: Manganese Steel Package List 1 x Extension Rod 1 x Wrench 1 x Storage Box