This water meter curb box key is precision machined from 630-stainless steel via casting, then heat-treated to deliver exceptional strength, hardness and corrosion resistance for long-lasting use. It features 3-core functions: 2-ends sized for 1-1/16 in. large pentagon bolts and 7/8 in. standard pentagon bolts to open water meter pit covers, while the third end can smoothly operate water meters, curb valves and stop and waste valves to turn water flow on or off. Equipped with an anti-lost carabiner ring, the tool can be hung on a waist belt for easy carrying during on-site plumbing repairs, or stored on a tool wall when not in use to ensure it is always within easy reach. Before use, users should verify the size of the target pentagon bolt and the dimensions of the matching nut groove to ensure proper fit and safe operation.