This bucket dolly is excellent for easy moving of 3-1/2, 4 and 5 gallon buckets when spreading glue, mortar and cleaning grout from tile. The clamp screws give better stability and allow the dolly to be picked up along with the bucket. Dolly has a reinforced design and is injection plastic molded. Also has five casters (two lockable) with ball bearing swivels and 3/4" wide x 2" diameter nonmarring wheels for a 300 lb. capacity. Weighs 4-1/2 lbs.