Features: Bleed key set: you will receive a single character keyhole key, a triangular key for barrier posts, two (square all-purpose key), two external tap keys and two bleed gate keys. Square key tap mainly make of zincs. The socket wrench is characterised by excellent corrosions resistance and rust protections, ensuring a long service life and break resistance. A replacement set of home technical wrenches replaces wrenches, faucet wrenches, heater keys, control cabinet keys and vent gate keys. 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 tool box or at homes so you have it at hand if necessary. Radiator bleed keys are commonly used for most water meters, electric meters, heaters, gas meters, control cabinets, elevator and water meter reserves. Specifications: Component: Iron, zincs alloy, aluminum Size: As Shown in the Picture Package Includes: 8pcs Construction Machine Key note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.