Special features Dynaplus® universal screws with TX drive are designed for optimal ease of screwing and can be used in various building materials. The universal screws screw in at lightning speed and can be used without pre-drilling in most cases. They are up to 50% faster than ordinary screws and have remarkably low insertion resistance, allowing many more screws to be processed per battery charge. The electro-galvanized screws are made of hardened carbon steel and, thanks to a sophisticated hardening process, are not only super strong, but also very flexible. This minimizes the risk of breakage; both during screwing and afterwards, when the screws have been processed and the wood starts to work. The extra deep TX drive provides a lot of grip and makes screwing easy. Technical data Diameter {mm}: 4 Length {mm}: 40 Thread type: Full thread Head model: Flat head Drive: TX-20 Drive type: TX Drive size: 20 Milling ribs: Internal Drill tip type: Cross-sections|Serrated thread Head diameter {mm}: 7.5 Helix: No Material: Carbon steel Surface treatment: Electro-galvanized Surface treatment color: Blue Lubricant: BASF CE Standard: 14592 Quality mark: SKH-9808 Plug diameter: 5|6