Customer Reviews for VEVOR Electric Hoist Manual Trolley, 1 Ton Load Capacity for PA200 PA250 PA300 PA400 PA500, Push Beam Trolley with Dual Wheels, 68 mm-110 mm Adjustable Beam Flange Width for Straight Curved I Beam
Seems to work ok. But it has only one roller on the underside of the beam to keep, the unit from tipping off the beam. I made a 2nd one. But was it or missing or only one comes with the beam roller system?