Jet Tools HD 1T, 1 Ton, Large Capacity Beam Clamps 749.29 3 have heat treated 140 Ah AGM Batteries 3 have heat treated stainless steel nozzles and needles This model provides nearly as much air as the 6820K17D and is equipped with a dual voltage switch • Welded all steel frame and powder coat finish provide maximum durability and protection• Clamp jaw is designed to distribute the load away from the beam flange edge increasing safety• Used for quick mounting of a hoist or for lifting a broad range of beams enclosed pockets provide greater stability and durability where the beam clamp attaches to the beam structure• Larger