We consulted with the top drivetrain manufacturers to insure that JEGS U-Joint Girdles are built to last. Machined from 2024-T6 aluminum to withstand the abuse a drivetrain receives and not crack or fatigue. Designed so that more of the bearing cap is in contact with the girdle which provides greater strength than straps or other girdles. All girdles are anodize finished and include fasteners. The 1350 Series Race Yokes feature ARP fasteners and are hard anodized for added strength and durability. Sold in Pairs. Made in USA.