?Compatible With?: The 128-185MM Universal Drive Shaft Fits for 1/10 RC Crawler Axial SCX10 Redcat Gen7 /Pro RC4WD D90,etc.Please check the manual of your specific model for compatibility before order though it is the universal drive shaft. | ?High Quality Material?: The RC Upgrades Parts is CNC Machined, Advanced internal spline. | ?Long-lasting Performance?:The long lasting and durable drive shaft provides unmatched driving versatility,it is a nice replacement accessories for the old or broken one. | ?Easy to Install?The drive shaft can be directly installed, do need any modification. It is designed to allow more smooth rotation and strength! Providing unmatched driving versatility. | ?Easy to Install?:great for replace the old or broken part.Increase overall performance and durability of your RC car.