If you're concerned about sign tampering or theft, use this tamper-resistant hardware kit to keep your sign in place. Specially made nuts break away during installation, leaving a tamper-resistant cone to hold the bolt.
• Use with U-channel Standard and square Premium posts
• Kit contains two each: carriage bolts and breakaway nuts (select bolt length above)
• Bolts and nuts are size 5/16-18
• During installation, once the breakaway nuts are tight, continue tightening with firm pressure to break off the hex head, leaving the tamper-resistant cone
Nice simple design for secure sign installation. Very easy to install. It seems to be plastic so I'm sure that it could be broken off with a hammer and screwdriver. However, it would be hard for the average person to realize this and there's no way to remove the cone with a wrench once installed.
Pros: Good Price / Value, Easy Installation, Attractive Design