Bleed key set: you will receive a one-character keyhole key, a triangular key for barrier posts, two (square all-purpose key), two external tap keys and two bleed valve keys. High-quality materials: square key tap mainly made of zinc. The socket wrench is characterised by excellent corrosion resistance and rust protection, ensuring a long service life and break resistanceHeater bleed key. Available in different shapes and sizes, suitable for most household switches. A replacement set of home technical wrenches replaces wrenches, faucet wrenches, heater keys, control cabinet keys and vent valve keys. Compact and lightweight: this set of triangular keys is remarkably compact and lightweight, making it easy to carry. You can store this set of outdoor tap keys in your toolbox or at home so you have it at hand if necessary. Wide application: radiator bleed keys are commonly used for most water meters, electric meters, control cabinets, elevators and water meter reserves. Control cabinet keys solve most keyhole problems without the need for multiple tools. Color:Silver Material:Metal Package Contents: 8 * Construction Machine Key