Universal 64P pinion gear, fit 3.175mm (1/8 inch) RC motor shaft, surface hardened, for RC car truck, electric grinders, etc.You will receive 5pcs (46T 47T 48T 49T 50T) pinion gear, 5pcs grub screws, and a hex key.The pinion motor gears are made of Aluminum Alloy, more stable, anti-wear, strong and durable.Frequency-hardened parts have higher wear resistance, higher strength and lower notch sensitivity, durable and reusable.Good pinion gear replacement for your device.Notice: Multiple sizes are available, please confirm the size before ordering.