The Vevor manual trolley is built for heavy-duty lifting applications on I-beams and H-beams in garages, warehouses, construction sites, and industrial settings. Its adjustable width from 2.5" to 7" allows a secure fit across a range of beam sizes. Made from alloy steel, it supports up to 4400 lbs and features dual wheels for smooth travel on straight or curved beams. Added safety elements such as a hexagonal nut, collision bumper, and anti-drop wire pin help improve secure operation. The included washers make setup and beam fitment easier.