The screw is produced from hardened carbon steel with CorrSeal surface treatment. Fitted with TX-drive/bits.The screw has a milling fuction in the start of the thread wich eliminates the need of pre-drilling (except for exotic wood types), it has an upper clamping thread which generates a high clamping force to help straighten up scewed boards. When mounted the clamping thread helps keeping the board in place allowing a smaller head design with the same or higher holding power than traditional decking screws.

The head of the screw is cylindrical with milling ribs undernieth, to make a nice splinter free countersunk finish. One advantage with cylindrical head is that it does not push the boards to split at the ends.