Steel Grate Mats are industrial-grade metal mats that offer maximum scraping action in any direction to help remove dirt, gravel, mud and snow from shoes and boots. • ld-rolled, strip steel with 13 gauge, rust-resistant, galvanized steel nnecting rods. The ends are smooth with plastic tubing. • 1" x 1" x 3/8" thick rust-resistant, 0.046