The Tolsen 54013 roofing nails are designed for securing bituminous shingles, insulation boards, and under-roofing materials to wooden supports. Each nail features a galvanized finish to protect against corrosion, ensuring a longer lifespan for your roof structure. These fasteners measure 3.1x30mm and are engineered with a thick shank and a large head to provide a secure hold without tearing through the roofing material. The annular ringed shank creates high grip within the wood, which prevents the nails from backing out over time due to temperature changes or wind vibrations. This 1 kg pack comes in a colored box, making it a practical choice for contractors or homeowners performing roof maintenance.