<p>This motor shaft collet is made of high quality steel material, straight shank with clamping nut to be tightened.</p> <p>Extension rod diameter and the other parts are precision ground to eliminate unbalance, increase safety when cutting.</p> <p>Straight extended shank fits for deep processing, meeting the needs of extending the depth of processing. </p> <p>Collet is well packed in a protective container with label for safe transportation and storage.</p> <p>It is widely used in boring, milling, drilling, tapping, grinding and other processing.</p> <p>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.</p> <p>Type: ER11A-8mm</p> <p>Color: black,silver</p> <p>Material: 45 Steel</p> <p>Height: 40mm \/ 1.57 inch</p> <p>Shaft Diameter: 16mm \/ 0.63 inch</p> <p>Shaft Inner Diameter: 8mm(+\/-0.02mm) \/ 0.31 inch</p> <p>Nut Diameter: 19mm \/ 7.48 inch</p> <p>Nut Inner Diameter: 9mm \/ 3.54 inch</p> <p>Package included: </p> <p>1 X ER22 A-8mm Motor shaft tool holder</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>