Oil Pump Primer Ford 5/16in

5/16-Inch Hex Engine Oil Pump Primer for use with Ford 351, 400, 429, 460 engines OIL PUMP PRIMER TOOL 5/16" Hex drive end for FORD 351 Cleveland, Windsor Fits popular engine of 351, 400, 429, 460 cubic inches Precision Cut aluminum bushing to insert in manifold for centering of tool Black Oxide finish shaft with Triangle head to eliminate drill chuck slipage Has centered 5/16" Hex cut out in shaft to fit oil pump perfectly Designed to prime the lubricating system of a rebuilt engine prior to its first start to prevent the damage of a dry start. It works by connecting to the oil pump shaft through the distributor hole and inserting in oil pump. For use with 3/8" hand drill.