6Pcs 3.17Mm To 3.17Mm ID Steering Universal Joint Shaft Coupling For Model Car

What is this?Universal joint shaft coupling allows for bending at any angle (maximum working angle of 45 degrees) and enables flexible change in the transmission direction. For instance, when a motor shaft is originally oriented to the south, the universal joint connection can re-direct the rotational axis toward the ground. This universal joint is suitable for model cars, model boats, robots, and other metal transfer connections.What will I get?Material: SAE 1045 steelThread Size: M3Inner Diameter: 3.17 mm to 3.17 mm (0.2 to 0.2inch)Length: 23mm / 0.91 inchOuter Diameter: 9mm / 0.35 inchColor: Silver TonePackage List: 6 Pcs x Universal Joint; 12 Pcs x M3 Fastening Screw; 2 Pcs x Mini Hex WrenchAre there any advantages of the product?The universal joint coupling nuts are SAE 1045 steel, which is sturdy and durable for long-lasting use. The universal joint coupling provides torque transmission and alignment, a cost-effective coupling design, which is very flexible and easy to use. Allow your work to accomplish work faster and more efficiently.How to use it?Connect the universal joint to the motor, put the screws into the side holes, and tighten them with a hexagonal wrench.What should I notice?NOTE: For manual measurement, please allow a slight dimensional error of the item.