Uxcell Shaft Coupler Connector L22 x D14 7mm to 7mm Bore Rigid Coupling with Screw for 3D Printers 4Pack

What is this? Shaft coupler connector is mainly used to connect the shaft of the motor and the Fully Threaded Rod to ensure the normal operation of the machine. Mainly used for 3D printers DIY model cars model boats model Airplane Is there any advantages of the product? 1. Shaft Coupler made of brass material durable corrosion-resistant and does not rust can be used for a long time 2. Top tight type rigid coupling high torque with rigidity low inertia and excellent sensitivity. 3.No rotation gap and elastic action can make up for symmetrical angular misalignment. How to use it? Select the appropriate size according to the motor shaft remove the old shaft connector from the motor shaft and then install the new motor shaft connector on the motor shaft. What should I notice? All size above is measured by manual please allow +/-0.1 inch error.