Our U-Channel Sign Posts feature a baked green enamel finish on hot-rolled, high tensile strength steel for years of maintenance-free performance. Posts come with 3/8" diameter pre-drilled holes that are 1" on center to accommodate most standard traffic signs (sign mounting hardware is sold separately). Post weight is 2 pounds per linear foot. Post Driver (87982) is also sold separately for easy installation. Baked Green Enamel is rust resistant and that the posts are for outdoor use.