Double-cranked, corrosion-resistant galvanised carbon steel spanner for imperial and metric radiator fittings. Fits metric 12mm hexagon and 12mm lug type plugs. Fits imperial 1/2″ hexagon, 1/2″ lug type vent plugs and black iron plugs. Double-cranked, corrosion-resistant galvanised carbon steel spanner for imperial and metric radiator fittings. Fits metric 12mm hexagon and 12mm lug type plugs. Fits imperial 1/2″ hexagon, 1/2″ lug type vent plugs and black iron plugs.