Product Description: ▶ Model: Masonry Nails Brick Stone Concrete Screws ▶ Material: 304 / A2 Stainless Steel ▶ Standard: GB/T ▶ Size: 0.5" 0.8" 1.0"1.2" 1.5" 3.0" 4.0" 5.0" 6" Features: A2 stainless is commonly referred to as 304 or 18/8 because it contains 18% chromium and 8% nickel. A2 is an austenitic stainless steel and is almost non magnetic but will still stick lightly to a magnet due to the cold working process. A2-70 is the most commonly used grade, the 70 represents a tensile strength of 700N/mm2. There are errors in the data, subject to the actual product, thank you for your understanding. Package Include: According to your Choose! .