ER16 collets are made of high-quality materials and are sturdy and durable. For CNC Milling Tool Holder. ER Straight Shank Tool Holder Collet. Long shank for deep hole machining. Shank Diameter: 5/8 inch; Shank Length: 4 inch; Shank Accuracy: 0.0003 inch. The nut can be directly tightened, with high rigidity and strong clamping force.
