Stainless Steel A4 316 Torx Drive (Star) Double Countersunk Screws available in extra long lengths.

A4 316 Torx Double Countersunk Wood Screws use A4 available for marine environments.
Double countersunk Heads For extra strength and sharp points to eliminate pre drilling even in most hardwoods.

European technical approval
ETA 11/0283 (Diameter 3,0 and 3,5 not component in the approval.
Wobble-free driving feature The TX inner multi-tooth drive allows the screw to be easily and securely screwed in when the screw is attached and countersunk.

Predrilling is not needed, even in most hardwoods. But given the many different 
properties of hardwoods we would always recommend testing before use.
European technical approval ETA 11/0283 (Diameter 3,0 and 3,5 not component in the approval)
- partial thread
- countersunk 90°
- double countersunk head
- TX inner multi-tooth
- standard tip
- at Diameter 10, 8 and at 6 x 140mm ribs under the head