The special drive – T-STAR plus – is a so-called hexalobular internal. Compared to less precise-fitting drive types like Phillips or cross recess, the contact surface is many times larger with our T-STAR plus, and the T-STAR plus bits are always positioned optimally in the screw head. The maximum, precise force transmission from the screwdriver to the screw that results from the use of T-STAR plus thus enables simple and ultra-fast work with much more efficiency than with other drives. What this means for you: No more annoying bit slips from the screw head – you can take care of serial fastening in no time at all!
Unlike the washer head, which transfers the tensile forces of the screw onto a larger area of the wood via its large underside, the narrow cylindrical head does not need to perform this task at all. With its size, which offers just enough space for the T-STAR plus drive, the cylindrical head can be completely countersunk into the wood, thus enabling simple, virtually invisible screw connections. The tensile forces exercised on a screw in wood construction are completely transferred to the wood via the full thread of the cylindrical head screws. If cylindrical head screws are installed horizontally, for instance decking screws on wooden decking, they can only be inserted flush in order to prevent water from gathering in the screw hole and damaging the wood. What this means for you: Even heavy-duty wood connections can be virtually invisible!
The fixing thread is a two-part thread featured on some SPAX screws. It consists of a main thread, which inserts into the substructure, and another thread below the head. The thread below the head is separated from the main thread by a short section of smooth shank, and ensures that the board remains securely in place on the substructure in all weather conditions. The smooth shank between the thread parts absorbs the movements of the board. What this means for you: No more re-fastening wooden boards that have become loose or creak too much!
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. What this means for you: You can skip an entire work step, since pre-drilling is no longer required for most woods. Saves both your screwdriver battery and your own energy – no more annoying slipping on smooth wood and derived timber products.
Screws made of stainless steel A4 can basically do everything that a screw made of stainless steel A2 can. However, the higher alloy grade 4 also makes these screws resistant to saltwater and acid. This means that A4 stainless-steel screws are ideal for use in coastal areas. Here, the high salt content of the air and water would quickly cause A2 stainless-steel screws to rust. If you are planning to build wooden decking around a swimming pool, you should also remember that chlorinated water contains acid, too.What this means for you: Stainless-steel A4 screws offer the ultimate corrosion protection for all applications – and we really mean all of them!