Permanent Installation Includes One Cross Bar/Rod And All HardwareMade In U.S.A.Automatically Moves Into Place When Jacks Are LoweredNo T-Handles, Twist Locks, Thumb Screws, Or Other Locking Devices NeededGreatly Reduces Side-To-Side Movement In The TrailerAttaches To All Scissor Jacks, Except BAL Low ProfileCan Be Mounted Across The Front Or Back Of Trailer