and high quality. It is ER25 precision spring collet. Widely used in boring,milling,drilling,tapping,CNC,sculpture and other processing operations,also can be supported used with the holder of CNC tool. Big clamping force,wide clamping range,high accuracy. ER25 collet is more convenient for use with MT3 cutter bar Clamping size:3mm 4mm 5mm 6mm 8mm 10mm 12mm 14mm 16mm Model Number:ER25 Application:Milling Cutter Color:silver+black material:metal Package Contents: 9* ER25 collet 1* MT3-M12 extension rod 1* wrench Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.