358 Securuty Fence is extremely difficult to penetrate, with the small mesh aperture being effectively finger proof, and extremely difficult to attack using conventional hand tools. '358' comes from its measurements 3" X 0.5" X 8 gauge which equates to approx. 76.2mm X 12.7mm X 4mm in metric. 358 security mesh spacing is designed to be finger proof, anti-climb and extremely difficult to penetrate using normal hand tools, giving high levels of perimeter protection. The 358 security fencing panels are popular in applications including prisons, border fences, boundary fencing military sites, secure compounds.