Features: <br> <br>Made of premium material, high strength and hardness, strong structure, durable in use. <br>High quality ER20 collet block for spindle motor shaft clamping. <br>Spiral linear thread, more convenient clamping, faster replacement, high clamping force. <br>Smooth surface, no scratches, stable performance. <br>Suitable for lathes, drilling machines, milling machines, boring machines, can clamp tap, drill, milling cutter. <br> <br> <br>Specification: <br>Model: C25-ER20-50L <br>Nut type: ER20A <br>Body length: 60mm <br>Axle hole: 6mm, 8mm, 10mm, 12mm, 16mm (Optional) <br>Package List: 1 x Collet Chuck Holder <br> <br> <br> <br>Note: <br>Please note that the new type and old type of this product will be sent <br>randomly, and make sure you will not mind before ordering.<br>1、Made of premium material, high strength and hardness, strong structure, durable in use. <br>2、High quality ER20 collet block for spindle motor shaft clamping. <br>3、Spiral linear thread, more convenient clamping, faster replacement, high clamping force. <br>4、Smooth surface, no scratches, stable performance. <br>5、Suitable for lathes, drilling machines, milling machines, boring machines, can clamp tap, drill, milling cutter.