Bleed key set: you 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. materials: square key tap mainly made of zinc. The socket wrench is characterised by excellent 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 : this set of triangular keys is remarkably compact and , making it easy to carry. You can store this set of outdoor tap keys in your toolbox or 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 Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.