Precision Fit: The D-profile design offers a flat surface for set screws to grip securely, preventing slippage while maintaining a smooth outer diameter for seamless movement through bearings. Robust Material: Crafted from stainless steel, each 6mm diameter shaft ensures long-term durability and consistent performance under heavy use. Optimized Dimensions: With a precise 260mm length and 54.9g weight per shaft, this 5-pack set is easy to store and integrate into drive systems with matching D-bore components. Secure Anti-Slip Performance: Many drive components feature a matching D-bore, which completely prevents the shaft from spinning inside. Compact and Versatile: Each 5-piece set is easy to store and transport, making these shafts a practical choice for various educational and competitive robotics scenarios.