Overhead stirrers are versatile lab devices for mixing and blending liquids in containers such as beakers and flasks. Unlike magnetic stirrers, overhead stirrers use a motorized drive and a rotating stirrer blade to agitate the liquid. This allows them to handle larger volumes and more viscous solutions that might be challenging for magnetic stirrers. They are commonly used in chemistry, biochemistry, and pharmaceutical labs for tasks such as dissolving solids, emulsifying liquids, and conducting polymerizations.