1 Set ER11 C6 ER11M 60L Extension Rod with ER11 Straight Shank and 7pcs ER11 Collets Built-in self-release design ensures tools will not get stuck in the holder Ideal for boring, milling, drilling, engraving, carving, CNC, and other machining applications Compatible with standard ER collet chucks for coolant-through applications Each collet is individually packed in a protective container with labeling Made from hardened, precision-ground material for high accuracy and performance stability Durable construction for long-term use Name: Extension Rod with Collet Color: Black + Silver Material: 40CR Package Contents: 1 x C6 Extension Rod, 7 x ER11 Spring Collets Product includes only the items listed above; other accessories are not included Note: Lighting and display differences may cause slight variations in color between the image and actual item. Measurement may vary by +/- 1-3 cm.