Forged flex end that features 3-1/4" long by 1" male threads for maximum adjustability and strength without sacrificing thread engagement. Many competitors use smaller thread sizes. 15deg of twist allowed to increase droop and compression without transferring torsional load to your control arm mounts. Center steel ball is controlled by tough urethane races to absorb shock and vibration while increasing off-road performance. U-bracket mount at the axle maintains use of factory rubber bushing.