The best way to install concertina wire is with barbed wire arms

This is Chain Link-Knuckle Knuckle 3-1/2' x 2" x 9 ga Commercial

Corner Radius: 0

2″ vertical uprights

These brackets are corrosion resistant and have a long service life

4" x .160 x 24' CR40 Commercial Galvanized Pipe for Chain Link Fences 120CommercialGalvanizedChainLink The best way to installThis is a 4" x . 160 x 24' CR40 Commercial Galvanized Pipe for Chain Link Fences. 4" nominal & actual O. D. . 160 wall thickness Cold rolled 40 weight Galvanized steel Made for commercial use Pipe must be cut down to lengths shorter than 8' or shorter to ship UPS, otherwise it would need to be shipped via a flatbed which is much more expensive. This pipe can be cut to customer specifications. Cut charges may apply.