1 Er-11A 5mm Milling Cnc Spindle Motor Shaft Chuck Extension Chuck Chuck Tool Holder, The motor shaft chuck is made of high quality stainless steel, and the shaft is tightened straight with a clamping nut The diameter extension and other parts are finely ground to eliminate imbalance and improve safety during cuttingThe extended straight and extended shaft is suitable for deep processing and meets the requirements of expanding processing depth The chuck is packed in a marked protective container for safe transportation and storageWidely used for drilling, milling, drilling, thread cutting, grinding, and other machiningThe chuck is made of high-quality steel and is used for milling lathes and engraving machines. The ER is a straight chuck rod with an extended shank, suitable for deep drilling. The nut can be tightened directly to ensure strong clamping force. This handle can reduce the cost and improve the efficiency and is a good replacement part for the old handle. Type: ER11A-5mm Color: Silver Material: Steel Size: Height: 40mm / 1.57 inch Shaft Diameter: 16mm / 0.63 inch Shaft Inner Diameter: 5mm (± 0.02mm) / 0.19 inch Nut Diameter: 19mm / 7.48 inch Nut Inner Diameter: 9mm / 3.54 inch Package Contents: 1 x Handle Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.