This Robinson Racing Products 48-pitch pinion gear features 9 teeth in their extra-hard wide-face design, sized for 1/8-scale motor shafts with a 3mm set screw collar for secure mounting. The wide gear face increases contact area with the spur gear for improved durability under hard use. It fits an exceptionally broad range of 1/10-scale electric buggies, trucks, and short course vehicles running 48P gear systems. A solid factory replacement or upgrade choice when you need a harder-compound 48P pinion. Features: 48 pitch, 9 tooth wide-face pinion Extra-hard compound for increased wear resistance Fits 1/8 motor shafts 3mm collar with set screw for secure attachment Wide gear face for greater spur gear contact 7/7/26 cs