Manufactured in USA; Harper exclusive I-Beam Glass Filled Nylon Plastic Frame is 30% lighter than steel and designed for maximum strength (Plastic frame is factory Pre Assembled). Heavy-duty 10" pneumatic wheels and 5" heavy-duty swivel casters
Glass-Filled Nylon Plastic Frame is chemical, corrosion and rust resistant for longer life
Converts in seconds from 2 wheel dolly to 4 wheel cart - 600 lb dolly and 700 lb cart capacity (Product images illustrates both uses, but only one cart is being sold)
Three position telescoping handle, built-in stair glides for easy moving up or down stairs and curbs
Frame factory assembled, requires easy assembly of wheels, casters, axle and base plate.