These Forgefix Worktop Clamps eliminate the need for surface mounted worktop joining strips. The nut is tightened onto the bolt, pressing the caps against the walls of the 35mm diameter holes. The clamps are Zinc plated for increased resistance to corrosion. APPLICATION Worktop joints. Zinc coatings prevent oxidation of the protected metal to create a longer lasting finish. It does this by forming a barrier and by acting as a sacrificial anode if this barrier is damaged. Zinc oxide is a fine white dust that (in contrast to iron oxide) does not trigger a breakdown of the substrate&rsquos surface integrity as it is formed. The zinc oxide, if left intact, can act as a barrier to further oxidation, in a way similar to the protection afforded to aluminum and stainless steels by their oxide layers.