5/16"x2.5" One Way Bolt/Break Away Nut/TheftProof

One Way Bolt with Break Away Nut, 2 bolt kit.  Theft Proof. 

5/16”x2.5" zinc plated steel one way bolts. Bolt head is cut away for one way tightening with straight edge screwdriver.  The kit includes 2ea. 5/16"x2.5" one way bolt, 2ea. 5/16" Break Away Nut and 2ea. 5/16" Nylon Washers which will mount one traffic sign to a post.