Diameter 16mm/20mm Universal Coupling Shaft Coupling Motor Connector DIY Steering Steel Universal JointOOTDTY Features:This joint or coupling connects rigid rods whose axes are susceptible to every other.Made of nice alloy steel, it's sturdy and has lengthy service life.It is often used for shafts that transmit motion.It includes a pair of hinges situated shut together, through a shaft.Widely used in machinery, reminiscent of textile machine, rolling mill, compressor, vacuum equipment, even in dentist kit and special screwdrivers.Specifications:Material: Alloy steelAllowed : 24N.forOuter Diameter: 16mm, 20mm(Optional)Inner Diameter: 8mm, 10mm(Optional)Length: 36mm, 42mm(Optional)Package Includes:1 Universal Joint2 Rings2 Rods