uxcell M1 Mod1 Pinion Gear Set, 5mm Shaft, 19T, 20T, 21T, 22T Motor Gear, Hardened Steel Pinion Gear with 3.17mm Coupler for RC Car (4 Pieces)

This universal Mod-1 pinion gear fits 5mm RC motor shafts. It comes with a 5mm to 3.175mm shaft coupler and can be used with RC cars, trucks, and more. Package includes: 4 pinion gears (19T, 20T, 21T, 22T), 4 grub screws, and 1 hex wrench. Material: Made of carbon steel, the pinion gears have higher hardness, strength, and deformation resistance. Surface treatment: Surface-hardened parts have higher wear resistance, strength, and less notch sensitivity, making them durable and reusable. Note: The pinion gears have soft teeth and cannot withstand excessive force.