The typical SPAX T-STAR plus drive is a so-called hexalobular
internal. This shape increases the contact surface of our T-STAR plus
and ensures optimal positioning for the T-STAR plus bits in the screw
head. By enabling maximum force transmission from the screwdriver to the
screw, T-STAR plus guarantees simple and ultra-fast work with much more
efficiency than with other drives.

In contrast to the countersunk head, which is designed flat to enable
flush screw countersinking, the raised countersunk head has a convex
shape. Depending on screw type and surface material (stainless steel,
nickel-plated, antique), these screws can be used as a decorative
element in furniture construction or for fastening skirting boards.

The screws with partial thread are ideal for fastening thin
components like engineered wood boards, panels and floorboards to
thicker components like squared timbers or beams. The short thread
penetrates the thick component, whilst the thread-free shank remains in
the attachment. This creates maximum contact pressure between the two.
The thread-free part should be at least the same thickness as the
attachment.

The CUT point on our SPAX screws enables the ultra-fast and effective
insertion of our wood screws without pre-drilling. In combination with
the serrations, the arrow-shaped CUT point reduces wood splitting and
tearing. The CUT point also enables extremely precise and sturdy setting
of the screw tip on smooth surfaces.

With our stainless-steel screws, the abbreviation A2 refers to the
alloy of the steel. Screws made of stainless steel A2 offer a high level
of protection against corrosion and medium strength. However, they have
low resistance to saltwater and acids. They are therefore used in
outdoor applications in non-coastal areas.