Designed to sit comfortably on top of a five-gallon pail, you will find the Ring Mount Mixer functions in both an open and closed pail. The impellers fold to fit through the bung opening and open up when the 5-gallon bucket mixer is activated. The entire paint bucket mixer can move to fit to a center or side opening in the lid. They are great for paint or other coatings stored in 5 gallon pails. The shaft and impellers have a quick disconnect for easy cleaning. The 5-gallon pail mixer is the best option for mixing in small batches when on the job.