RC crawler fans, listen up! Want to lower your truck's center of gravity and make it more stable on those tricky climbs? These brass rear C-hubs (also called C-housings or knuckles) are a popular upgrade. They replace the plastic stock parts on the rear axle of many 1/10 scale crawlers like the Axial SCX10, Traxxas TRX-4, and similar models. Why brass? Because it's heavy! Adding weight down low at the wheels seriously improves traction and reduces tipping. This set comes with two C-hubs (left and right) and four screws you need for installation. They're machined from solid brass, so they're durable and should last. They have a nice yellow/gold color. Installing them is pretty straightforward if you're comfortable doing basic RC maintenance – just take off the wheel, undo the old hub, and swap in the brass one. Makes a noticeable difference in performance on rocks and uneven terrain. Makes your rig look cooler too with that shiny metal. Just double-check they're compatible with your specific model before buying!