Overhead Trolleys - Fall Arrest Beam Trolleys. Supplier: Miller Fall Protection / Honeywell. Description: The Beam Trolley is adjustable and slides along with the worker to provide maximum mobility. The lightweight Beam Trolley Retrofit Kit (9065) adjusts to fit beam flanges from 3-in. (76 mm) to 4-1/2-in. (114 mm) wide. 9065-1 Perfectmmodates I