Drum tumblers are used to vigorously mix drum contents by forcing the contents from one end / corner to the other. They are ideal for thorough mixing of viscous or easily sedimented fluids, coarse pellets, wet grains or powders. The drum tumblers are not portable and hence, require moving of the drums to them for mixing. Drum rollers on the other hand are generally lightweight and mix the content more safely by holding the drums in place and turning them on rollers. These drum rollers are easily movable and can be transported to the point of use for mixing the drum contents.