That includes :Front Kncukle Arm-2PCSC-Hubs-2PCSRear Knuckle Arm-2PCSStainless steel Round Head Screw 3x20-6PCSStainless metal Flat Head Screw 3x6-4PCSStainless steel washer 3m-4PCSOriginal name / role No:AR330519+AR330523+AR3305221. Front c-hubs: help knuckle arms to turn efficiently.2. Front knuckle arms: Assist steering.3. Right back knuckle hands: Stabilize CVD drive shaft and bearing.Major highlights of updating on part/product :1. Constructed with a fantastic lightweight high tensile energy aluminum 6061 T6 for greater durability.2. Delrin collars are put to reduce the region and friction thin steering performance is best.3. Knuckle hands: Delrin collars sit to attenuate the space and fortify the fitting for a smooth and stable drive.4. Exquisite 3D improve produced by CNC product showing modern and metallic appearance.