The Sign Guardian safely and easily attaches signs to chain link fences while avoiding protruding bolts, u-channels or scrap metal. Stays secure, provides a clean look and reduces liability. The 2" Sign Guardian is made from nylon 6/6 with a 1" zinc alloy R bolt. Fits on chain link mesh of 1.75", 2" and 2.25". Can only be removed with one-way bit.