Truck Cap Topper Lock Rod Bars Used with most all truck cap manufactures. The 2 Point Heavy Duty Lock Bar System are used on fiberglass and aluminum truck cap rear doors. Generally used with single t-handle locks which are mounted in the center of the rear door. Features: Multiple Lengths: 50-1/2", 54-3/8", 60-3/4", 61-3/4", 65", 66", 72" (fully extended measurement) All locking bars are measured from end to end in a fully extended position (locked position). This is the overall measurement with both rods included, The opened position (unlocked position) measures 1-1/4" shorter, which allows the door to be opened. Includes (2) 5/16" rods, center cam, and (2) rod guides. Completely assembled. Used with T-handles that have a 5/16" square shaft and 1-1/2" mounting holes Can be used on rear or side doors on truck tops and RV compartments Bars can be cut to match applications. (no returns accepted for cut bars)