This is the best bucket dolly available for professional use. With it's low center of gravity, the lowest on the market, it is almost impossible to tip. The exclusive 5" diameter center hole accepts a 5 gallon bucket and can hold it at an angle making it easier to access material. It has 5 heavy duty casters for easily moving and turning heavy 5 gallon buckets. The dolly has a reinforced design, molded from plastic. Weighs 4 lbs.