C16 ER20A 100L CNC 16x100mm CNC Lathe Milling Holder Straight Shank Chuck ColletFeatures-Extended straight shank type handle、 with longer handle body、 -Suitable for deep hole processing，to solve extend depth of processing need-For reducing the using of extended cutting tool、 reduce the cost of processing、 increase efficiency-The extension rod diameter and other part all through precision grinding，eliminate unbalance，to increase security when cuttingSpecificationsModel: C16 ER20AMaterial: stainless steelSize：30*16*136mmLength handle：100mmDiameter:16mmColor: silverPackage included1x Nc straight shank extension rod