These radiator keys are made of zinc alloy, light and practical, durable and sturdy, not easy to break, easy to hold and turn. The radiator key is useful for bleeding air from radiators. Enough quantity of radiator keys with square hole, sufficient quantity to meet your daily demand. Features -Color:Silver -Material:Zinc alloy -Size:2.70X2.50X1.00cm/1.06X0.98X0.39in - Features pre-drilled hole for convenient carrying and storage, not easy to get lost. -Our radiator keys have good compatibility, durable, can serve for a long time. -Sufficient quantity can meet your various demands, and you can share them with your friends and family. -Our radiator valves keys have wide range of use and mainly used on faucets and radiators -Light, portable, not easy to break, and is a convenient and practical radiator exhaust valves key. Package list: 8 x Radiator Valves Keys