Description: Material: Crafted from metal material, these rc crawler wheel hubs extension drive adapter extended couplers are designed to provide long-last performance and reliability for your 1/10 scale model car Enhanced Stability: The extended design of the couplers ensures improved stability and handling, making them an ideal replacement part for your TRX4 model vehicle Secure Fit: Each coupler comes with an internal lock nut, ensuring a secure and tight fit that prevents loosening during use Feature: The wheel hex is designed for preventing the shaft from falling out and improving the precision. Reduce the space and closer to the wheel, extend the wheelbase by widening the width of the hex Package Includes: This package includes a complete set of wheels hex hub extension hex drive adapter, providing everything you need for a full upgrade or replacement Specification: Material: Metal Size Chart: Package Size: 15cmx8cmx4cm/5.91inchx3.15inchx1.57inch Package Includes: 1 Set RC Car Wheel Hubs Extension Drive Adapter Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitors and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!