Original Name / Part No.: AR310864 / AR310780Part location: Front or rear drive shaft areaProduct major functions & usage: Transferring the power and leading the drive of the wheels.Accessories:CVD 2pcsStainless Steel Flat Head Screw 3x8 2pcsSpring Coil 2pcsMajor advantages of upgrading to this part/product :1. The alloy 6061 T6 and steel mixed material combination is strong and powerful but also maintain light in weight.2. CVD design so the transmission is more smooth and powerful.Other special notes and comments:Suitable for ARRMA GRANITE ARR102665 / ARR102676.