Everyone knows how important it is to prime the oil pump before starting up that newly rebuilt engine...right? Well, our Oil Pump Primers help get the job done right. They all feature a nonslip triangular drive tip for attaching a drill, as well as a black oxide coating for added durability. The Pro models have a top alignment collar. The Chevy tool also includes a bushing to pressurize the upper valve train. The Econo models consist of the oil pump drive shaft only.