This Robinson Racing Products pinion gear is a hard 48-pitch, 25-tooth design with a 5mm bore, built to fit a wide range of 1:10 and similar-scale electric vehicles. The machined metal construction is part of Robinson Racing's hard pinion line, intended as a durable replacement or upgrade over standard pinions. A set screw is included for securing the gear to the motor shaft. Features: 48 pitch, 25 tooth configuration 5mm bore fits common motor shaft sizes Hard machined metal construction Includes set screw 7/7/26 cs