• Ribs under head for improved countersinking
• Special plating to give 1,000 hours salt spray resistance
• Multi-layer coating consisting of organic top coat barrier and a zinc base layer
• Dual angle thread for ultimate performance and exceptionally high pull-out resistance
• Patented twin cut technology for rapid "pick-up" and reduces timber splitting
• All sizes up to and including 75mm are fully threaded and lengths 80mm and above all have 70mm thread length