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Description
Drilling screws with building authority approval. These drilling screws have a bi-metal drilling tip and a drilling capacity of 3mm, so they are suitable for attaching our trapezoidal rails to trapezoidal steel sheet metal with a sheet thickness of 0.63mm or more. The approval of screws for aluminum sheets starts at 0.50. The drilling screws have an EPDM sealing washer under the head.