This Robinson Racing Products pinion gear features a 45-tooth, 48-pitch design machined from aluminum with a hard coat anodized finish for increased surface durability. The hub includes a set screw for secure motor shaft mounting. It is a direct-fit replacement or upgrade option for electric RC vehicles running 48-pitch gear systems. Features: 45 tooth count, 48 pitch Hard coated aluminum construction Set screw hub retention Compatible with 48P spur gear setups 7/7/26 cs