"Well designed fixing screw for corrugated roof sheets. They have a spacing collar that goes under the sheet so that when the screw is tightened it traps the sheet between the spacer collar and the screw. There is also a plastic washer that goes under the head of the screw and provides a seal to the fixing it also has a cover that fixes over the screw head making a strong waterproof seal. Easy to use and the sheets are well secured. The 200 pkt. of fixings is a good buy as apposed to buying single packs. I bought two packs and I am well pleased with the result."
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Review 3 for Ariel Vistalux Corrugated ASB 3" PVC Sheet Fixings Clear Pack of 200