A drum handler is like a special tool that helps people move big heavy containers called drums. These drums are usually made out of metal or plastic and they can be filled with all sorts of things like chemicals, liquids, or even food.
So, imagine you have a big drum filled with something heavy and you need to move it from one place to another. It would be very hard to pick up and move it by yourself, right? That's where a drum handler comes in.
A drum handler usually has two wheels and a handle that you can push or pull. You put the drum on the holder of the drum handler and then use the handle to make it roll. This makes it much easier to move the drum around.
Some drum handlers are electric and have a motor that can lift and move the drum for people who might not have enough strength to do it themselves.
So basically, a drum handler is like a special helper that makes it easier for people to move heavy drums from one place to another.