This Factory Team set for the Enduro SE vehicles provides machined ring and pinion gears for precise mesh fit, and both are made of steel for increased durability.The six mounting screw holes add another level of durability, and the included Golden Grease ensures smooth performance. Use the shims in the package as needed for precise spacing.This part fits the following vehicles:EnduroEnduro Gatekeeper Rock Crawler/Trail TruckEnduro Trail TruckEnduro Trail Truck, KnightrunnerEnduro Trail Truck, Knightrunner, blueFeatures:Machined Steel Ring Gear SpoolSix (6) mounting screw holes for added durabilityMounting holes use M2 x 8mm SHCS screws, includedMachined Steel Ring Gear, 30TMachined Steel Pinion Gear, 8TAssembly Golden Grease includedFour (4) each ring and pinion shims includedFor the 1:10 Element RC Enduro SE line