Our U channel sign post kit contains everything you need to mount a sign i.e. a U-Channel Post, two bolts (5/16" x 2"), two nuts, two metal lock washers and two plastic washers. All sized posts (3, 4, 5, 6, 7, and 8 feet) are offered individually as well as in kits. Choosing a kit over individual posts saves you a lot of time and money.