The SPAX typical drive T-STAR plus is a so-called internal hexagon. This shape increases the contact area of our T-STAR plus, allowing the T-STAR plus bits to fit optimally in the screw head. The best possible power transfer from the screwdriver to the screw through T-STAR plus enables quick work and is significantly more efficient than all other drives. The screws with partial threads are excellent for fastening thin components such as wood-based panels, boards, or planks to thicker components like beams or posts. The short thread screws into the thick component, while the unthreaded shaft remains in the attachment. This creates maximum clamping pressure between the two. The unthreaded part should be at least as thick as the attachment. The term 4CUT refers to the square shape of the screw tip. These edges displace the wood fibers during screwing and create space for the screw's core diameter. The spreading pressure that the core exerts on the wood is thus reduced, preventing the wood from splitting near the edges. The necessary torque of the cordless screwdriver is also reduced, as the screw's core does not have to "squeeze" into the wood. With WIROX, SPAX has developed a coating that is far superior to galvanization in terms of corrosion protection. WIROX does not use chromium (VI), and the screws remain just as durable and environmentally friendly even after years in outdoor conditions that are not directly exposed to the elements. WIROX screws are the first choice for all open structures without direct weather exposure, such as carports or pergolas. For direct weather exposure, such as on terraces, we recommend our screws in the stainless steel variant.