Heavy duty street name sign bracket 5 1/2" (flat blanks) U channel PROFESSIONAL & VERSATILE: Mounts to top of u-channel post with included Hex bolts (FASB51634) SUPERIOR OUTDOOR DURABILITY: Our U-Channel Heavy Duty Street Sign Bracket allows for a long-lasting product (so you dont have to replace as often!) PERFECT FOR EXTRUDED SIGNS: Includes everything needed to signs to U-Channel posts STURDY: Heavy Duty Street Sign Bracket is an excellent choice for all types of weather and road conditions SIMPLE ASSEMBLY: 1/4 slot for extruded signs, 3/16 slot for flat signs (includes: Hex Bolts & Set Screws)