Description:<br /> This collet is made of high quality steel for milling lathe tool and work-holding engraving machine. ER straight rod type collet extension handle body is relatively long, suitable for deep hole processing. The nut can be directly tightened to provide a powerful clamping force. This collet  can reduce costs, improve efficiency and would be a good replacement part for your old one.<br /> <br /> Specifications:<br /> Type: ER11A-8mm<br /> Material: Steel<br /> Height: 40mm / 1.57"<br /> Shaft Diameter: 16mm / 0.63"<br /> Shaft Inner Diameter: 8mm(±0.02mm) / 0.31"<br /> Nut Diameter: 19mm / 7.48"<br /> Nut Inner Diameter: 9mm / 3.54"<br /> <br /> Package Includes:<br /> 1 x Collet<br /> <br /> Note:<br /> Please allow 1-2mm error due to manual measurement. Thanks for your understanding. <br>