DC Cargo Mall E Track Trailer Tie-Down Rail Installation Fasteners Kit - 1.5" Hex Head Metal Screws With Self Drilling Tips (10 Pack) Installation 10-pack kit for E and A track tie-down systems Galvanized 1.5" hex head metal screws with #14 diameter self-drilling tips Anchor horizontal and vertical E track rails in cargo trailers and trucks Reliable, heavy-duty, top-quality Fast and easy installation and removal with 3/8" diameter drive