Smart features that save your knuckles and your time. Our Straight Service Wrench makes changing sizes quick and easy. The reversible Ratchet Wrench has square openings of 1/4” and 3/16” on one end and 3/8” and 5/16” on the other end. And, when it comes to accessing liquid- and suction-based valves, reach for our Hex Key Adapter. It works on 3/16” and 5/16” hex valves.