THE LAST JOINT YOU WILL EVER NEED: "BALLER" Informal adjective: extremely good, impressive, or excellent. MetalCloak's Baller Joints HD Ball Joints for the JL Wrangler and JT Gladiator are the ONLY Ball Joints that are comprised of top-level materials with ALL the best features contained in one package. This is the last ball joint you will ever need. Upper and Lower Load Bearing, Captured, Fully Sealed, Adjustable, On-Vehicle rebuildable and Made in the USA. UNRIVALED FEATURES & MATERIALS: MetalCloak uses the best features and combines them with top quality materials to create a ball joint replacement set that is unrivaled; this is the only ball joint that is Fully Sealed, Captured, Adjustable, On-Vehicle rebuildable and made in the USA. Replace your worn ball joints with the best you can get. PROVIDES MAXIMIZED BEARING AREA: MetalCloak ball joints start with 4140 Spindle & Ball with Induction Hardened surface strength that resists wear and provides a maximized bearing area to distribute force loads; the material gives superior ability to absorb energy without fracture over inferior materials. RESISTANT TO DEFORMATION: Composite bearing sleeve slide over the spindle to handle shock loads and are the most resistant to deformation. Ball and spindle are both load bearing and utilize metal-on-metal strength captured with Tool Steel Races that eliminate memory steer and are long lasting. ADJUSTABLE FOR PRELOAD TENSION: Both upper and lower joints are adjustable for preload tension, have recessed zerk fittings for servicing and are sealed with multiple Buna-N Rubber O-Rings along with wiper seals on the shafts to keep contaminants out and grease in. Aluminum lock nut and Thread on Top Cap capture the joints so there is no possibility of pulling the joints out of the C. AMERICAN MADE QUALITY: Anodized Red aluminum with Silver and Gold Zinc steel plated components highlight the quality and craftsmanship and are sure to let others know you appreciate American Made quality and top-notch performance. The ONLY joints that are Sealed, Captured, Adjustable, and On-Vehicle rebuildable; the last ball joints you will ever need. Like other ball joints; only better. LIFETIME CUSTOMER SERVICE: Metalcloak provides lifetime customer service and support. If you have any problem whatsoever with your product, simply contact us and we will find a way to make it right. MetalCloak's Upper Ball Joint Upgrade Kit, designed for Jeep JL Wrangler and JT Gladiator, stands alone with top-tier materials and comprehensive features. This is your final ball joint upgrade. The Upper Ball Joints are Captured, Fully Sealed, Adjustable, In-Jeep rebuildable, and proudly made in the USA. Key features include: