Item Type: Lathe Collet Extension Rod Model: SL20-ER32-80L Material: High speed steel Uses: CNC lathes, milling machines, drilling machines. Shank Diameter: Approx. 20mm / 0.8in Adapter Chuck: Approx. 32mm / 1.3in Handle Length: Approx. 80mm / 3.1in Package List 1 x Extension Rod 1Straight rod type extended collet shank, longer shank, suitable for deep hole processing. 2Can reduce the use of extended tools, reduce costs and improve efficiency. 3The nut is directly tightened, the product has high rigidity and strong holding force. 4The outer diameter of the extension rod and other parts have been finely polished to eliminate the unbalance and increase the stability during cutting. 5Wide range of uses, can be used for CNC lathes, milling machines, drilling machines, etc.