Features Prevents Motor Shaft Slipping: D-shaped holes effectively secure the motor shaft, ensuring no slippage during . Enhances motor stability and performance. Versatile Mecanum Wheel Connection: Enables seamless connection between Mecanum wheels and power motors, providing flexibility and adaptability in various robotics applications. Compatible with Various World Robots: Suitable for TETRIX, FTC, FRC, FIRST, WRO, and other global robots, ensuring broad compatibility and usage across different robot platforms. Essential Industrial Robot Component: A crucial part for industrial robots, ensuring smooth and efficient in industrial automation and manufacturing processes. Manufacturing for Fit: Undergoes a rigorous manufacturing process to ensure a match with industrial robots, guaranteeing precision and reliability in robotic applications. Features: 1、D-shaped holes are used to effectively prevent the motor shaft from slipping. 2、Can be used to connect for Mecanum wheels and power motors. 3、Suitable for TETRIX, for FTC, for FRC, for FIRST, for WRO and other world robots. 4、A necessary part for the industrial robot. 5、After strict manufacturing process, it can ly match the industrial robot. Specification: Item Type: Wheel Shaft Coupling Material: Metal Inner Diameter: Approx. 6mm / 0.2in (D-shaped hole) Outer Diameter: Approx. 55mm / 2.2in Hole Length: Approx. 25mm / 1in Package List: 1 X Wheel Shaft Coupling Note: Due to manual measurement, there is a slight error, thank you for your understanding. Package List 1 X Wheel Shaft Coupling