Brass Weighted Extended Hex Adapter 12mm Widening Hub for TRX4 TRX6 Crawler Heavy Wheel Axle Upgrade

The product is made of brass material using CNC processing, which can increase the vehicle's weight, lower the center of gravity, extend the wheelbase, improve vehicle stability, and have high-strength fixing pins that are less prone to slipping.  Coupler Material: Brass  Thread: M4  Hexagon: 12mm  Locking Nut with Internal Lock Can Lock CVD from the Outside of the Wheel Hub to the Inside Replacement Anti-loosening Nut