Galvanised barbed wire
Galvanised barbed wires are made from high tensile wires. They are particularly effective at deterring intruders due to the sharp barbs found along the wires.
PVC-coated barbed wire
These wires are vinyl-coated to prevent rusting. Similarly, they have sharp spikes to prevent intruders from entering the premises.
Concertina barbed wire
Concertina barbed wires are coiled wires that are expanded to form a continuous barrier. They are highly durable and are often used to prevent prisoners from escaping as well as trespassers from entering.