The forgefix multi purpose screw set contains a selection of the most popular sizes the screws have countersunk heads and a zinc yellow passivated finish for increased durability the zinc yellow passivation process of electroplating is similar to the galvanised and zinc plated processes but with the addition of a yellow dye it offers an aesthetically pleasing finish whilst having excellent resistance to corrosion the countersunk head is designed to sink flush with substrates to leave a smooth su