These Forgefix TechFast Roofing Sheet to Steel Screws have the following specification:

Size: 5.5 x 80mm
Effective Thread Length: 71mm
Head Type: 8mm Hex
Pack Size: 100
Drill Tip: No.5

No.5 drill tip for self-drilling in heavy gauge steel up to 12.5mm.

Pack Quantity: 12
Height: 92
Length: 182
Width: 90

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