The Powerbuilt Rotary Barrel Pump is ideal for dispensing light to medium viscosity oils. Simply attach the included 2" bung adapter to the lid of any 30 to 55 gallon barrel, then rotate the handle to dispense about 200cc of fluid per revolution. Note, the rotary barrel pump is not for use with water-based fluids, solvents, acids or antifreeze. Powerbuilt Tools are Serious Tools for Serious Work. Millions of Powerbuilt products are used every day around the globe, on the job, at home and in the garage. Powerbuilt tools are built with the performance, features, fit and finish to satisfy the most demanding users. No matter which Powerbuilt tool you select, you will enjoy the added confidence of knowing that all Powerbuilt tools and equipment meet or exceed applicable standards set by the US Government and American National Standards Institute (ANSI). Ready to get serious? Get Powerbuilt tools!