The Lincoln Heavy Duty Hydraulic Coupler Model 5845 is a high-pressure grease gun adapter designed for heavy-duty applications by hand or power operated units with a 1/8” NPT. With a maximum pressure of 7,500 PSI It is a durable and reliable tool that can withstand tough use without compromising on performance. The heavy-duty construction and features make it a valuable asset for professionals who require a high-quality grease gun for their work.