PROBLEM SOLVER GUSHER BEARING -- Metal-to-metal design provides strength and allows grease to flow through the bearing surface for reduced friction and long life. STRONG AND DURABLE -- Ball studs are heat processed to match or exceed OE requirements to inhibit premature failure and improve fatigue strength. GREASEABLE SOCKET -- Inhibits corrosion and wear by allowing new lubricant to flush debris. KEEPS DIRT AND WATER OUT -- Pre-installed boot shield socket components from wear-causing debris. ABSORBS IMPACT -- Belleville preload washer helps keep the bearing package tight as bearings wear. EASY TO INSTALL -- Precision tolerances for easy installation and steering alignment, giving you a perfect fit right out of the box.