Westin Brute Bedsafe boxes are made of .100 inch thick diamond tread aluminum and are 53% lighter than steel boxes. The aluminum heavy duty roller drawer is made of .125 inch thick smooth mill and is weight rated at 350 lbs with even distribution. The top and sides have a 500 lb rating for evenly distributed weight. Bedsafe boxes have a rain gutter feature to keep water out and and the contents dry. Inside, there are movable dividers for item organization as needed. Made in the U.S.A. and backed by a Limited Lifetime warranty.