This heavy duty gearbox delivers extra durability and a precision gear mesh and alignment- the alloy construction insures the drive shaft gear maintains 100% teeth engagement against the diff gear to eliminate the problem of worn gear teeth and poor gear mesh. Additionally, a larger 11mm bearing is included to better withstand the forces of high powered motors on the input shaft to reduce bearing failures. Beautifully polished, anodized and laser etched for a showroom look. Requires the 1/10 Losi Baja / Rock Rey kit.