... ,Electro galv. White,Bule,Yellow 3)Steel: 45# Concrete nails(45# steel), Galvanized or Black Concrete Nails, Steel Concrete Nails, Concrete Washer Nails ... ,Diamond point,Flat head or Counter head concrete steel nails. Concrete nails are widely used for concrete walls, stone ... ,Electro galv. White, Bule, Yellow,3) Material: 45% middle carbon steel.4) Hardnees: Min. 55 Detailed Sizes2.5X25mm, 3.0X40mm, 3 ...