Galvanised Nails have been coated after manufacture with zinc for corrosion protection. For exterior use or where moisture may occur.

Handy Tips – Smooth Shank Nails / For Common Fixing
A rule of thumb that can be used for determining the length of nail required is three times the thickness of the timber being fixed. e.g. 25mm Timber = 75mm Nail.
Stagger nails where close nailing is necessary to prevent timber splitting.
When nailing near the edge of the work surface it may be necessary to drill pilot holes using a slightly smaller diameter drill than the nail shank to stop the timber splitting.
Wherever possible, skew nail to maximise joint strength.

Jolt Head nails have a small diameter head particularly suitable for applications where the head is required to be concealed. This head may be punched beneath the timber surface. Jolt head nails are designed to either finish flush with or below the work surface.