we have four kinds of this product. ①.twofold ordinary barbed wire machine: it is generally applied in manufacturing a great variety of multi-strand of barbed wires, which are widely used in national defense, railway, superhighway, agriculture and farming, etc ②.twofold straight twisting & reverse twisting barbed wire machine: it is generally applied in manufacturing twofold straight twisting and reverse twisting barbed wires, which are widely used in national defense, railway, superhighway, agriculture and farming, etc ③.single strand barbed wire machine: it is generally applied in manufacturing single strand barbed wires, which are widely used in national defense, railway, express superhighway, agriculture and farming, etc. ④.razor barbed wire machine (razor type barbed fence machine): razor barbed wire machine is specialized in manufacturing razor wires. it has high efficiecy and quality with compact structure, small volume, easy operation and regulation, convenient maintenance and low power consumption. with all above, it is the most suitable for producing all kinds of razor barbed wires.