Our offered array is fabricated from A2 Stainless Steel. As the name expresses, this includes an inward pin inside the attachment which requires a unique additional touch or key wrench to embed and eliminate. This diminishes the danger of altering by hoodlums or gatecrashers fixing the screws. The Hexalobular TORX inward drive encourages a more dependable slipless fixing. Because of its 2-way reusable fixing ability, this is a valuable security screw where support is required.