Razor shaped metal blades designed to keep enemies at a distance. We sell large rolls of concertina wire but we have had many requests for smaller, easier to manage size rolls. We teamed up with our trusted German Surplus supplier and they had some made for us. Maximum extended length is 160 feet. Recommended extension length is 32 feet. Designed so simple tools can’t cut through it. Made of galvanized steel. This wire is Made in China but is very high quality. New. It is the responsibility of the buyer to ascertain and obey all applicable local, state, and federal laws.