Aluminum Two Stage tripod, universal 4 bolt Flat base all metal plate with Mitchell mounting, designed for extreme weight and torsional rigidity, 374-pound capacity, Built in Bubble, Tripod leg scaling for precise leveling, Large all metal locks and locking Clamps, 30 to 56 inches’ height range, weight 29 lbs., Includes integrated Mid-Level Spreader and spiked or rubber feet that manually rotate into position. (Mitchell Adapter and Locking Knob are available in the accessories section)