This motor shaft collet is made of high-quality steel material, featuring a straight shank with a clamping nut for secure tightening. The extension rod diameter and other components are precision ground to minimize imbalance and enhance safety during cutting operations. The straight extended shank is suitable for deep processing applications, allowing for increased processing depth. The collet comes well protected in a labeled container for safe transportation and storage. It is commonly used in boring, milling, drilling, tapping, grinding, and other machining operations. Designed for use with milling lathes, engraving machines, and work-holding equipment, this ER straight rod type collet extension offers a longer body ideal for deep hole processing. The nut provides strong clamping force when tightened. This collet helps reduce costs and improve efficiency, serving as a reliable replacement for worn or damaged units. Type: ER11A-8mm Color: Black, Silver Material: 45 Steel Height: 40mm / 1.57 inch Shaft Diameter: 16mm / 0.63 inch Shaft Inner Diameter: 8mm ± 0.02mm / 0.31 inch Nut Diameter: 19mm / 0.75 inch Nut Inner Diameter: 9mm / 0.35 inch Package included: 1 x ER11A-8mm Motor Shaft Tool Holder Note: The package includes only the items listed above. Light reflection and display differences may cause slight variations in color between the image and the actual item. Measurement tolerance is +/- 1-3cm.