This Slipper Set is supplied pre-built and ready to install in your vehicle. Metal slipper hub for added durability in brushless applications Durable composite 61 tooth, 0.8MOD spur gear for reliable power handling capability Built around a strong red anodized aluminum slipper shaft Molded composite nut to set the spring tension for consistent slipper setting Supplied assembled and set, ready to install into your vehicle Fits all ARA32xx and ARA35xx models