CNC Machined from high grade aluminum material, these aluminum rear A-arms are made specifically for the Traxxas Slash. Aluminum A-arms adds great strength to the rear suspension of your truck, and when combined with aluminum front A-arms, provide a bullet proof setup. For smooth suspension operation, the hinge-pin holes are fitted with machined delrin inserts. A-arms come with heat-treated carbon steel polished lock-nut style hinge-pins. Solid in design and construction.