Builders Automation Machinery (BAM) staircase assembly clamp, model 2210, accommodates up to 20 foot long stringers with a maximum width of 54". Air cylinder clamping holds stringers, treads and risers in position for glue and wedge application. Includes seven, side-retaining members on each side, positionable to allow nailing through stringers, one year warranty. Weight 1,500 lbs, size 3' x 3' x 18'. 110 PSI at 2 CFM air requirements.