Features:     Made of high grade specially formulated spring steel, durable in use.       Professional manufacturing, exquisite workmanship, high reliability.       Built in self-release design and tools will never get stuck in holder.       Use with any standard ER collet chucks for coolant-thru tool applications.       Widely used for boring, milling, drilling, silk attack, sculpture, CNC, and other processing.                                 Specification: Condition: 100% brand new Spring Collet Model: ER11-1, ER11-2, ER11-3, ER11-4, ER11-5, ER11-6, ER11-7 Package List: 1 x Extension Rod 7 x Spring Collet                 .wang-edit-text{                     font-family:'Arial' !important;                 }                 .wang-edit-text table {                     border-top: 1px solid #000;                     border-left: 1px solid #000;                 }                 .wang-edit-text table td,                 .wang-edit-text table th {                     border-bottom: 1px solid #000;                     border-right: 1px solid #000;                     padding: 3px 5px;                 }                 .wang-edit-text table th {                     text-align: center;             } Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.