EMI has recognized the need for a versatile yet convenient multi-fire / rescue tool. The results - The 511 Tool. Capable of five different functions; Adjustable hydrant wrench, spanner wrench, gas shut-off tool, pry axe head, striking hammer head, this tool is essential gear for all firefighters and emergency responders. The 511 Tool is manufactured of high strength treated alloy. It is also non-sparking, corrosion resistant, lightweight and can be worn easily on a utility belt.