"The JET 2-HDT manual trolley is designed to add the mobility you need to your shop. With an ample 4400-pound capacity, this hoist comes standard with a selection of spacer washers for quick adjustments to fit beam flange widths. Hardened wheels with double sealed, permanently lubricated bearings are ideal for wide-flange H beams, standard I beams, or curved track. Compliance OSHA, ANSI/ASME B30.11 and B3017 standards. Capacity lbs. 4,400, Min. Radius Curve in. 43, Works With Wide-flange H beams, standard I beams, curved track, Flange Width in. 3 1/4-8, Beam Height in. 6, OSHA Approved Yes, Material Type Steel with powder coat finish. Multiple spacer washers make beam flange wide adjustment quick and easy Hardened wheels with lubricated for life, double sealed ball bearings For use with wide-flange H-beams, standard I beams or curved track Proof tested with test certificate"