Bird barrier dura-spike narrow bird spikes, 102 ft. – bp-s2100 dura-spike bird spikes are 100% stainless steel and are available in three-foot lengths for fast application. The base can be cut easily with snips or shears. It curves gently or takes hard bends to conform to the building’s features. features where to use: ledges, parapets caps, roof peaks, chimneys target bird: pigeon and larger bird pressure: medium (do not use where birds are nesting) material: stainless steel – 304 grade wires & base welded together installation: base is glued or screwed to any surface installation level: easy