Expanded aluminum nails are made of high-grade aluminum, which is sturdy. This guarantees that they'll withstand the worst conditions, have a longer lifespan than normal screws, and will not loosen over time.By adopting a special enlargement design, it can be easily penetrated into concrete, wood, and different materials. The aluminum constitution ensures sturdiness and strength, making it an ideal preference for various projects.Very compatible for installing wall cabinets, security windows, and wall panels. It is simple to enter slim areas and set up in hard areas.Category: ScrewMaterial: Aluminum alloyDimensions: 5x7mm, 5x9mm, 5x11mm, 6.4x20mm, 6.4x23mm, 6.4x30mmUsage: Tap the higher part, and the lower part will increase after tappingApplicable to: furniture, cabinets, doorways and windows, concrete, wood, etcQuantity: 10/20/30/50/100pcs