Enclosed Track Hoist Trolleys are the part of the crane that holds the lifting device in the Track. They ride in either a Bridge in a Work Station Crane (WSC) system or in the Boom in a Work Station Jib (WSJ) crane. They vary slightly in size at each capacity but generally look like the picture shown here. Gorbel's® Hoist Trolleys have patented, molded wheels that provide much longer life and better rolling than traditional steel wheels used by other companies.