Compatibility: The wrench is designed to fit bolt head sizes, allowing for a secure and precise grip on a variety of nuts and bolts. Fire Hydrant And Coupling Adjustable Wrench 1-3/4 Inch Ahw - Buy Fire Fire Hydrant Valve Wrench Professional Plumbing Tool Single Head Spanner Adjustable Hydrant Wrench The jaw opens from 1.5 inches all the way up to 6 inches, meaning it can handle practically any hydrant cap or valve you'll encounter. Made from heavy-duty... Reliable Function: It is built for loosening caps and opening valves with ease, providing a dependable tool for emergency situations or routine maintenance. QWORK Versatile Wrench: This heavy duty adjustable hydrant wrench is designed to fit a size range of 1-1/2" to 6", making it suitable for various hydrant caps and valves Versatile Wrench: This heavy duty adjustable hydrant wrench is designed to fit a size range of 1-1/2 to 6, making it suitable for various hydrant caps and valves.