Precision Zinc plated square column 3” x 44”. Built-in Jack Screw. Gear rack welded to column. Web design for easy anchor bolt mounting. 4 leveling screws for alignment on all types of surfaces. Removable wheel assembly. Accommodates vacuum pad without loss of machine stability. Roller Carriage: Precision rack and pinion gear system. Adjustable stainless steel rollers for precision alignment and smooth travel. Single lever “slip through” handle Lock bolt for securing carriage in a position. Control Panel with AMP Meter and 120 V outlet for vacuum. 32” Carriage travel.