The SPAX typical drive T-STAR plus is a so-called internal hexagon. This shape increases the contact surface 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 engineered wood panels, boards, or planks to thicker components like beams or posts. The short thread screws into the thick component, while the unthreaded shank remains in the attachment. This creates maximum clamping pressure between the two. The unthreaded part should be at least equal to the thickness of the attachment. The term 4CUT refers to the square shaping of the screw tip. These edges displace the wood fibers during insertion and create space for the screw's core diameter. The spreading pressure exerted by the core in the wood is thus reduced, preventing splitting of the wood near the edges. Additionally, the required torque of the cordless screwdriver is decreased, as the screw's core does not need to "squeeze" into the wood. With WIROX, SPAX has developed a coating that far surpasses 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 non-directly weathered outdoor areas. 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 stainless steel.