Permanent Installation Includes One Cross Bar/Rod And All Hardware Made In U.S.A. Automatically Moves Into Place When Jacks Are Lowered No T-Handles, Twist Locks, Thumb Screws, Or Other Locking Devices Needed Greatly Reduces Side-To-Side Movement In The Trailer Attaches To All Scissor Jacks, Except BAL Low Profile Can Be Mounted Across The Front Or Back Of Trailer