these are new but the previous owner opened the packaging. they have not been installed. so get yiur new gear set at a discounted price. The Yukon Dura Grip and Eaton Spider Gear Set is a high-quality drivetrain component designed specifically for Ford 8.8" differentials with 28 spline axles. Manufactured by Yukon Gear in the US, this set comes with a 1-year manufacturer warranty, ensuring durability and reliability. The brand's reputation for producing top-notch gear and axle components makes this product a dependable choice for car and truck owners looking to upgrade or repair their drivetrain system.