Milescraft 1313 DrillPump300 - Self Priming Transfer Pump Works with most electrical drills with a maximum speed of 2, 800 RPM Hose connection is 1/2 inch and uses any 1/2 inch hose Pumps up to 300 gallons per hour and is self-priming up to 9 feet The 3/8 inch shank on this unit fits all common chucks for most drills