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

Size: 5.5 x 45mm
Effective Thread Length: 31mm
Head Type: 8mm Hex
Pack Size: 100
Drill Tip: No.3

No.3 drill tip for self-drilling in light gauge steel up to 5mm.

The TFHL5545 TechFast Hex Head Roofing Screws have the following specifications:

Size: 5.5 x 45mm.
Pack quantity: 100.

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

Size: 5.5 x 45mm
Effective Thread Length: 28mm
Pack Size: 100
Drill Tip: No.3

No.3 drill tip for self-drilling in heavy gauge steel up to 5mm.

The TFHT6345 TechFast Hex Head Screws have the following specifications:

Size: 6.3 x 45mm.
Box quantity: 100.

These Forgefix TechFast Metal Roofing to Timber Screws have the following specification:

Size: 6.3 x 45mm
Steel Thickness: 0.5-1.2mm
Head Type: 8mm Hex
Pack Size: 100