These Forgefix TechFast Timber to Steel CSK/Wing Screws have the following specification:

Size: 5.5 x 50mm
Clamping Thickness: 21mm
Effective Thread Length: 22mm
Pack Size: 100
Drill Tip: No.5

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

Pack Quantity: 24
Height: 90
Length: 135
Width: 60

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