A universal pinion gear tool for both 1/8 on road and GT nitro cars with 2 speed transmissions. Included is an aluminum hub to hold and lock either 1/8 on road or GT clutch bell and a 2^nd tool to install and tighten up both 1^st and 2^nd gear pinions onto the clutch bell. This tool allows tightening the pinion gears without causing damage to the teeth of the gear. A must tool to have for on road race!