JET® PT Series heavy duty Manual Trolleys are available in capacities from 1/2 ton to 10 Tons. Built with heavy gauge steel for increased durability, the large steel wheels and thicker bearings provide smooth movement on a variety of beams. The built in bumper guards increase user safety and extend the life of the trolley. Each JET® Manual Trolley conforms to OSHA regulations, and ANSI / ASME standards.