Grizzly H8006 1 Ton Heavy-Duty Beam Trolley
Turn any adequately supported steel I-beam into an overhead moving system with one of these I-beam trolleys. removable spacers allow for adjustments to fit any standard size I-beam. adjusts from 2-1/2-Inch to 8-1/2-Inch. it has solid steel wheels with heavy-duty ball bearings.