358 柵欄, High security fencing or Prison Mesh Fencing as it is also known, 係一種高度堅固嘅鋼網圍欄系統. 防爬圍欄由水平同垂直網狀金屬絲組成，呢啲網狀金屬絲嘅位置靠得好近，以防止人們把手指穿過孔, 最終爬上圍欄.
Anti climb fence is a much more secure barrier than the common 358 mesh fence. It has the same wire thickness as 358 fence, but the size of mesh opening pattern is smaller. The intruder can not climb up with fingers and toes, and conventional bolts or wire-cutters have no way to cut the anti climb fencing.
Anti-climbing fence has more rigid double vertical wire welding structure, which makes it difficult to cross. Anti-climb rigid mesh fencing has the advantages of anti-climbing, anti-cutting, anti-corrosion, and good viewing visibility. Combined with the fence top of razor barbed wire, security fence spikes, or tooth spikes, it becomes a ideal high-security fencing for high-end applications, such as, prisons, military and power facilities.