I only see short ones that attach to a drill, and are made to mix gallon cans of paint. I have several 5 gallon buckets of a roofing sealer that have been sitting for years and settled. It's a tar-like material, and rather thick. Stirring by hand seems near impossible. I just need a long enough stirrer to put in my drill. I have a powerful industrial plug in drill that should handle the job, if I can find an appropriate stirrer.