Material: Made of zinc alloy; durable, corrosion-resistant, high strength, and good durability. Easy to carry: Portable size and keychain, convenient for carrying. Application: Suitable for most water meters, radiators, gas meters, elevators and control cabinets, faucets available on the market. Package contents: 1x 4-Way Multi Function Instrument Key with Screwdriver;1x the inside diameter of 9mm Water tap faucet keys;1x the inside diameter of 8mm Triangle key;1x the inside diameter of 9mm Triangle key;1x the inside diameter of 6mm square Key. Note: This key is suitable for all standard-sized valves. Before purchasing, please confirm the size of the key you need and carefully review our size chart to prevent any mismatch with your equipment. .