This Speed Bolt, some call them "Quickie Bolts", are now in your choice of sizes! 9in long by 3/4" loose nut with a 7/8" hard nut welded on 3/4" rod or 7/8" nut on each end and 7/8" rod for big iron. These are designed to pull 2 beams (connecting plates) together quickly to make a tight connection. Allowing a standard bolt to be inserted into connection point. Extra course threads for speedy tightening.