This Robinson Racing Products pinion gear features 21 teeth cut to 32 pitch (0.8 mod) and is machined from steel for durability. It includes a set screw for securing the gear to the motor shaft. Designed as a direct replacement or upgrade pinion for electric RC vehicles using 32 pitch drivetrain components. Features: 32 pitch / 0.8 mod tooth profile 21-tooth count Steel construction Includes set screw 7/7/26 cs