This product is a genuine Traxxas spool differential designed to lock the drivetrain for direct power delivery and maximum traction. It eliminates differential action to provide equal power to both drive wheels, making it ideal for drag racing, speed runs, and high-traction surfaces. The solid construction offers increased strength and durability under high torque loads and aggressive driving conditions. This spool differential is compatible with Traxxas Slash 2WD, Rustler 2WD, Stampede 2WD, and Bandit models that use the matching transmission setup. It is an ideal upgrade for drivers seeking maximum straight-line performance and drivetrain reliability.