1. Sack Trucks A sack truck is essentially an upright trolley frame which is used for transporting objects. It has long handles, and a small ledge base, and two wheels. When an item is placed on the sack truck, the handles are used to manoeuvre the truck so it is pivoting on these two wheels. This makes heavy and cumbersome objects a lot easier to manoeuvre and lift off the ground. It is sort of a basic form of a lever mechanism.