Warn all metal Premium Hubs exhibit a long list of technical advantages no other hub can match. The external hub body is constructed of the practically indestructible ZA27 super alloy. Both utilize all metal components. Inside cap assembly, wave spring technology is used to enhance reliability. Longer clutch-ring spline teeth and body spline area result in better load handling. Warn Premium Manual hubs feature a larger body wall thickness to optimize clutch-ring strength. Rapid positive engagement prevents ratcheting, dual dial seals lock out containments, and a corrosion resistant, chrome-plated finish substantiates our goal of never-ending performance. Warn hubs install in under one hour per set and are guaranteed. They're the best selling hubs in the world and the only hub made right here in the USA.