【Fits For】:Metal Slipper Clutch 0.8 Pitch Upgrades Part for 1/10 Granite 3S Senton 3S Vorteks 3S Big Rock 3S Kraton 4S Outcast4S 1/8 Typhon 3S. 【High quality material】: Differential Made of high-quality steel material, Hard anodic oxidation and anti-rust treatment on gear surface, long service life for these gears. 【More Durable】:The upgrades part is durable enough,improves the overall performance of the rc car.Specially designed strengthening cut-outs for increased crash resistance. 【Easy to Install】:great for replace the old or broken part.Increase overall performance and durability of your RC car. 【Long-lasting Performance】: The rc car upgrades parts highly increase the strength and precision.