Yeebyee 10mm to 10mm Rigid Shaft Coupling D20xL25 Connector Aluminium Rigid Clamp-on Type Shaft Couplers for Stepper Motor CNC Machine 3D Printer, 2pcs/Pack(10mmx10mm)

["Shaft Couplers Materials: made of good quality Aluminum Alloy, Sturdy, Surface oxidation treatment, high hardness and excellent performance.","Shaft Usage: Bore Diameter: 10mm to 10mm/0.39inch to 0.39inch; Length: 25mm/0.98inch; Outer diameter: 20mm/0.79inch;","Type: Rigid Couplings Set Screw (Clamping-on type);","Functions: Rigid Shaft Coupling is simplicity in structure, Cost effective coupling design, high torsional rigidity, no backlash, low maintenance, highly oil-resistant, high temperature resistance and suitable for high-speed rotation, not easy to loosen.","Package Included: 2pcs Rigid Shaft Couplers, 1pcs Allen Key","The shaft couplers widely used for 3D Printers, CNC machines, DIY Encoder, Servo Motors, Spindle, Step motor, Ballscrew etc."]