The screws are made of solid material with high hardness. Self-drilling and self-tapping work effortlessly. No slipping or head breaking when installing on color steel tiles and steel structures. The galvanized coating provides great rust and corrosion resistance. We keep repurchasing for bulk engineering orders.

Complete range of countersunk head and washer head types. Standard sizes with zero deviation, tight engagement and no loosening. Perfect fitting during installation. Fast delivery and sufficient stock, very reliable for long-term cooperation.

Exquisite workmanship with uniform threads. Strong penetrating power, no pre-drilling needed. No rust or falling off after outdoor use for more than half a year. Quality is far better than ordinary brands with high cost performance.

Full specifications and customized support available. The screws have good toughness and are not easy to break. Suitable for home decoration, steel structure and roofing projects. Neat package with no defective products, plus timely after-sales service.